Shane Mc Mahon was Vince McMahon's most consistent Dragon. He started off as a non-action one, serving as Vince's second-in-command and letting whoever was the other dragon do most of the fighting, but over time began wrestling more frequently and he eventually Took a Level in Badass so that he played a more physical one as well.
ARN ANDERSON: Basically made a career as "The Enforcer" of the Four Horsemen, always there as the second-in-command to Ric Flair. Even the one time they were at odds in September-October 1995, it was all a setup for Flair to turn on Sting at WCW Halloween Havoc 1995 and reform the Horsemen with Brian Pillman, and Chris Benoit being added the next night on WCW Monday Nitro.
Tonga Fifita (Meng in WCW, Haku in WWE) made a career out of playing The Dragon to various heels. He Dragoned for Bobby Heenan, Colonel Robert Parker, Kevin Sullivan (during the Dungeon Of Doom), and his final mainstream wrestling role was The Dragon to Rikishi during Rikishi's attempted main event heel push.
Chikara had a rare subversion of the Ass Kicking Equals Authority with the Die Bruderschaft des Kreuzes (BDK). The stable's top wrestler was Claudio Castagnoli, but the real mastermind behind the whole thing was Claudio's tag partner Ares.
Dolph Ziggler seemed to be playing the role of The Dragon to Vickie Guerrero, until he went out on his own, aligned himself with AJ Lee and now has Big E. Langston on his side.