- Boba Fett. He only appears for eight seconds and gets killed by Hitler of all people, but his lines were so awesome that he's become very popular, with people pleading for him to return. Interestingly enough, he was voiced by Ray William Johnson, a particularly divisive YouTube personality, which shows how much people liked the character. To the point where he got his own bonus episode during the season 4-5 hiatus.
- Nikola Tesla. His battle with Thomas Edison was one of the most requested rap battles up until they fought. He also is one of the few battlers to be overwhelmingly considered by fans to have curb stomped his opponent.
- Edward Kenway. His cameo in "Blackbeard vs. Al Capone" was so popular, there is a huge, increasing number of fans begging for him to have his own battle.
- Raphael and Michelangelo (the artists) are quite popular thanks to being played by Smosh.
- According to many of the comments on YouTube, Mr. Stay Puft was best part of the "Ghostbusters vs Mythbusters" rap battle - with many saying he won.
- Michael Bay's appearance in "Spielberg vs Hitchcock", where his raps are agreed on as some of the weakest in the battle (his first verse is pretty much just how much he's all about Money, Dear Boy, and the second about how he doesn't care about his critics), but the cinematography and effects are praised as excellent. In other words, Michael Bay's rap segment was just like a Michael Bay movie.
- Also, Quentin Tarantino.
- Lump the wiener dog appeared in the "Bob Ross vs. Pablo Picasso" battle for all but 1 second, but he's one of the most popular cameos in the ERB series. His wiki page has 92 comments, showing that this minor character had sparked more discussion than many of the actual rappers (including the "stars" of the battle he appeared in — Bob Ross and Pablo Picasso — themselves).
- Cast-wise, Xin Wuku's stunts get a lot of love.
- Sacagawea has been called the best part of "Lewis and Clark vs Bill and Ted", mainly for much of her cameo consisting of her beating up a bear in the background.
- Bruce Banner/The Hulk. Even though his battle was very one-sided in favor of Bruce/Caitlyn Jenner, the vast majority of voters on both the Wiki and the forum consider him the winner.
- From "Alexander the Great vs Ivan the Terrible", Frederick the Great proved very popular despite getting the least amount of lines of all the main rappers. It helped that he got his own unique beat, and an awesome one at that.
- Also from "Alexander vs Ivan", Pompey the Great got a lot of love due to being a Butt-Monkey who only had one line in the battle, leading many fans to view him as a tragically wasted character.
- T-Pain deliberately dials back on the Auto-Tune, delivering a very entertaining and popular take on Stevie Wonder.
- WHAT'S UP, BITCHES?! I'M THEODORE ROOSEVELT AND I'M SO GOD DAMN AWESOME THAT AFTER I FIRST APPEARED, ERB NEWS BECAME ERB NEWS STARRING ME!
- Juliet from the Romeo and Juliet vs. Bonnie and Clyde. Her rapping segments are the most popular for how hilarious and memetic they are, and if youtube and wikia comments are to be believed, then Juliet alone won the rap.
- Beethoven, although this is mostly due to his opponent being Justin Bieber.
- Lenin and Putin in Stalin vs Rasputin.
- Doctor Who, especially when he turned into the Fourth Doctor.
Ensemble Darkhorse / Epic Rap Battles of History