First off, you're incorrectly putting Lesnar in the PG era list. OP did also say to do of the past fifty years, and you've started in the Golden Era which is only around the 1980s.i will do top ten of each era:
golden era; bret, flair, piper, randy savage, dibase, dusty rhodes, ultimate warrior, legion of doom, hogan, andre the giant.
attitude era; austin, HBK, undertaker, the rock, HHH, owen hart, kurt angle, kane, vince mcmahon (the austin feud), Stratus
PG era: Edge, Orton, Y2J, Cena, Cm punk, Lesnar, Jeff Hardy, Christian, Batista, Sheamus