I would put Nogueira #1 since he has beaten more top HW than Couture but I can't really argue with it. Sylvia is defiantly ahead of Gonzaga. I would also put Vera,Werdum and Arlovski ahead of Gonzaga and Cro Cop and Kongo would round out my list.
*I excluded Mir who hasn't beaten anyone with a pluse in years and Obrein who is out injured for a long time.
Shogun IMO still goes over Rampage and way ahead of Henderson who's LHW record isn't very impressive. Wanderlei and Liddell go ahead of Henderson. Listen to Damone and get rid of Jardine, Alexander, and Hamill also put Machida ahead of Lambert and Rashad.
*Overall pretty good job on this one I think you overrated Henderson which isn't rare everyone seems to do that lately.
Good except Okami should be ahead of Marquandt and Cote shouldn't be on the list at all.
Like the list but Serra goes behind Karo and I personally put Swick behind Serra (note I'm a huge Swick fan so take it with a grain of salt).
BJ is around 6 since he has beaten no one. Stevenson is #1 if you don't count Sherk. Fisher, Thomas, Guida, and Florian all go ahead of Penn. Also you forgot Frank Edgar. and take Neer and Varner off since Neer is IFL and Varner is WEC (he is a beast btw and will win the WEC LW title from razor rob).
Good job man I respect you coming foward and looking for knowledge.