For me, it's easily Golga. Now, I understand most people's arguments, that The Shockmaster was intended to get over big time, and was an abject failure. As much as it was painfully bad, it was pretty harmless to us all, as eventually, they'd make it into a comedic gimmick.
Golga, on the other hand, actually
got over, and potentially was one of the biggest gimmicks of the Attitude Era. Legitimately. I'm not sure what people loved about this gimmick, but god damn if the entire world didn't fucking pop for this horrendous gimmick. And arguably, Golga was the most over of the bunch. Yes, it was because he piggybacked off South Park and Cartman, but this man, in an age of Rocky, Austin, Mankind, and The Undertaker, was fricking over. Take a listen to this pop. And mind you, this was against Jeff Jarrett, who couldn't draw flies if you rolled him in shit.
[YOUTUBE]OFbFtv-947Q[/YOUTUBE]
Yes, I don't care what you say, this gimmick was over in The Attitude Era. And for me, it's much more painful when a bad gimmick gets over. The Shockmaster was prett painless, and was over in a few months. The Oddities lasted a freakin year, in which they had angles with the most over woman in professional wrestling at the time, Sable. This was originally supposed to be an over heel group, that would become a face group that got one of the biggest pops of the night.
That, plus this group was flunkied by the Insane Clown Posse. Milenko be damned, you can't get any worse than that. The Shockmaster was just fun and humor, while the Oddities were an intentionally bad group of heels that turned into one of the biggest groups of faces in the WWE's biggest period of wrestling history.
Golga takes this one, in a rout.