Most of these have obvious answers, but
Eddie
Benoit
Sid
are good questions. I like Sid's mid 90's WWF run, Eddie's WWE run, and Benoit in WCW.
Edit:
More good ones mentioned
Hogan- WWF
Nash/Hall- WCW, Nash's run as Wolfpac babyface was his career highlight and he had more memorable moments than as Diesel. Same with Hall.
Booker- WCW, he was a better worker then and still over without the same push/airtime. The King Booker gimmick was too goofy to me to be serious and not stupid enough to be funny, he was at his best as a pure babyface who got over with his in-ring skills (and got over big in WWE like that too, before the HHH incident)
Rude- WWF, that's hard though
Eddie
Benoit
Sid
are good questions. I like Sid's mid 90's WWF run, Eddie's WWE run, and Benoit in WCW.
Edit:
More good ones mentioned
Hogan- WWF
Nash/Hall- WCW, Nash's run as Wolfpac babyface was his career highlight and he had more memorable moments than as Diesel. Same with Hall.
Booker- WCW, he was a better worker then and still over without the same push/airtime. The King Booker gimmick was too goofy to me to be serious and not stupid enough to be funny, he was at his best as a pure babyface who got over with his in-ring skills (and got over big in WWE like that too, before the HHH incident)
Rude- WWF, that's hard though