Yeah, I would have had The Undertaker a little higher. His angle and character were one of the highlights of many a "RAW" during the Attitude Era.
I'm one of the biggest Undertaker fans on this board, but I don't know how much higher he would be. His career began well before the Attitude Era and lasted well beyond it, so most fans don't tie him to just that era. Austin, The Rock and Triple H are hands down the top 3, and Mr McMahon has got to be the 4th with them. But part of me wants to put DX at 3rd instead of Triple H or HBK because their juvenile bullshit was virtually as great as Austin and The Rock IMO.
I'd consider Undertaker over HBK and maybe Mick Foley, but that's it, if that. For just the Attitude Era - top 4 should of been Austin, Rock, Triple H, McMahon. After that, Taker, HBK and Foley in some order. Kane above the New Age Outlaws too.
Everyone that should be on the list is on it. My opinion, Austin, Bret, and Shawn should be 1 2 and 3.
Bret Hart was great, but Bret is not above The Rock and a lot of people on that list, arguing the Attitude Era specifically. He left for WCW halfway through the era, and wasted away because they had no clue how to use him there. If you counted the New Generation era as well, then I would gladly say Bret Hart has a strong argument for the Top 5.