The only people in professional wrestling to get any real success without a manager acting as a Large Ham, or being a ham themselves were Chris Benoit and Bret Hart. Though even Bret Hart had Jimmy "The Mouth of the South" Hart hamming it up for him during his tag team days. Hart got a tiny bit hammy during his late 90s heel run.
WWE chairman Vince McMahon turns into a Large Ham, not only on the WWE's own programming, but whenever there's a camera on him. This is best shown in the documentary Beyond The Mat, in the scene where he gives Darren Drozdov his gimmick. "He's gonna puke! He's gonna PUKE!" The "tidal wave of phlegm" phenomenon that is so prominent in his way of saying "You're fired!" that it's impossible to hear it without laughing.
And then there's Hulk Hogan, who almost merits his own page on this wiki and set the standard among Professional Wrestling for large hamminess that all others emulate.
Bryan Danielson was long pegged as an impossibly brilliant wrestler who unfortunately had no personality. Then he won the Ring of Honor World Heavyweight Championship and started bringing the ham. His hammy act included daring the audience to riot because he is a "ONE MAN RIOT SQUAD," forcing the ring announcer to call him "The best wrestler in the world, with an emphasis on entire world," or most famously putting his opponents in illegal holds for as long as the referee allows him because "I HAVE TILL FIVE!".
During his heel World Heavyweight Champion run in WWE, we have "YES! YES! YES! YES! YES! YES! YES! YES! YES! YES! YES! YES!" after winning matches (or doing anything, really).
Kurt Angle certainly qualifies. This was lampshaded by John Cena: When Kurt was throwing a tantrum in the ring, Cena popped up on the TitanTron and yelled: "Kurt! Kurt! Stop it, man, you're acting like a friggin' ham sandwich!
CM Punk has taken a turn for the gloriously hammy ever since adding religious/cult overtones to his Smug Straight Edge gimmick. His performance at the 2010 Royal Rumble, where he cuts a promo interspersed with eliminating whoever comes out next doubles as both a Crowning Moment Of Awesome and a Crowning Moment of Hamminess.
"Let me thank you all for joining me, in what will be the most historic moment my Straight Edge Society has ever seen. These were just the first of twenty-nine other men who will be thrown over the top rope, or if they have the courage that the WWE Universe LACKS... they CAN be saved! And unfortunately not everyone can win the Royal Rumble... excuse me. It'sclobberin' time."
Ted DiBiase. During his Million Dollar Man days, his promos (complete with constant shouting, a maniacal laugh so OTT it has to be heard to be believed and attempts to buy everyone and everything in sight) managed to be the largest ham in a business and era filled with them. Ted DiBiase, Jr...not so much.
Kevin Sullivan was pure deviled ham during his "powers of darkness" phase in the 1980's.
Vickie Guerrero seems to have developed some hammy qualities as a side effect of needing to talk over the amazing heat she gets from the WWE Universe. Her late husband Eddie Guerrero was so hammy he made nephew Chavo come off as flat.
On the Real Life page, we gave sports commentators a mention, so as you can imagine in pro wrestling, regardless of the federation or country, ham is constantly served at the commentators' table.
The most famous example is quite probably "Good Ol' JR" Jim Ross. His ability to get overexcited about any match and to make even the weakest of jobbers look like a badass is what people love about him (and probably a big part of the WWE's success in the first place).
"GOOD GOD ALMIGHTY! GOOD GOD ALMIGHTY! THEY'VE KILLED HIM! WITH GOD AS MY WITNESS HE'S BROKEN IN HALF!!"
Ladies and gentlemen, my name is Paul Heyman, and I am a LARGE HAM.
Sir Donald Sinden, in the BBC Radio adaptation of Death On The Nile. And the BBC Radio adaptation of The Hound Of The Baskervilles. The TV series Never The Twain was one long Ham-Off between him and Windsor Davies.
The radio version of The Hitchhiker's Guide to the Galaxy features a particularly hammy performance from their Zaphod Beeblebrox. This can also apply to the TV version, it used the same actors, but the low-budget second head tends to reduce the ham.
Ray Goulding, one-half of radio satirists Bob & Ray, who used his classic theatrical baritone to great effect in skits calling for this character type. Partly justified by the medium he was parodying, but mostly just because he was having a whole lot of fun.
Edwin Blackgaard is an in-universe example from Adventures in Odyssey, but he's almost as bad off-stage. It makes for a very sharp contrast with his evil brother, Regis, who gives a quieter, more even-handed performance and is scarier for it.
Regis even lampshades this when he's talking to Jason, saying "My brother may be a scenery chewing ham, but he does have excellent taste."
Webb's would be the title character of the recurring sketch, "The Surprising Adventures of Sir Digby Chicken Caesar", an insane hobo who thinks he is a dashing adventurer.
Mitchell's more prone to histrionics, but is not likely to top the series 3 finisher, where he played a man with no arms, legs, torso, or neck, engaged in a feverish and increasingly ludicrous description of the world's most beautiful art object.
'BLOOD FOR THE BLOOD GOD! SKULLS FOR THE SKULL THRONE!
HARRIERS FOR THE CUP!
Ciaphas Cain gets his own Large Ham even, in Cain's Last Stand, when he gives a propaganda speech to the planet. Even Inquisitor Vail has no comment on it, because quite frankly it's so out of character that it speaks for itself.
Some of the many alien powers in Cosmic Encounter seem designed to encourage players to play them this way, but especially the Sniveler.
And the Silencer, for whom booming 'SILENCE!' at the top of your lungs is almost mandatory.
In Exalted, it seems like one of the prerequisites for becoming one of the titular Exalted is to be a colossal ham, and The Fair Folk, Demons and Deathlords get in on it too.
Infernals have an especially large slice, since they can appease their demonic masters by ranting about their Evil Plan.
Anyone in Chuubo's Marvelous Wish-Granting Engine with the (Overacted) Speechlessness Bonus XP condition will most likely be devouring the scenery at the drop of a hat. The pregen character Leonardo de Montreal from Glass-Maker's Dragon would be the standout here.
Also those with the Fist-Pump/Salute XP condition, as displayed by pregen character Jasmine Apocynum.
Ooblar is definitely this in Jimmy Neutron's Nicktoon Blast, possibly even more-so than in the movie. He is completely overwhelmed with happiness on the opportunity to take-over the world, taking the opportunity to remind that to the riders at every turn.
The TFWiki.net article on Shokaract, already a large ham in-fiction anyway, has every caption written in a similar hammy style, even when he's talking in Buffy Speak. Behold, the first caption:
Shokaract: MISERABLE INCONSEQUENTIAL WORMS, I AM SHOKARACT, MASTER OF TIME, SPACE, AND SELF-AGGRANDIZING HYPERBOLE!
Judge Dead from the Noob franchise, whose onscreen actions usually consist of acting as Judge, Jury, and Executioner due to his MMORPG Game Master profession. When he has to carry out a sanction, he exposes the fault and the punishment in very loud, enthusiactic and microphone-altered toward towards being deep voice while moving his arms around. He sometimes throws in an Evil Laugh or two.