I think overall the general concensus is he is a very talented individual that certainly had a bit of a "boost" in his Pride days. I think when he entered an organization where fairly strict regulation was involved he lost some of that magic but still talented none the less. He doesn't crack my top 5 which goes something along the lines of : GSP, Fedor, Bones, Anderson, Aldo
I think the UFC fanboy view that that Shogun was the product of roids in Pride and couldn't make it in the clean UFC and I think he came back and stuffed this crap down their throats beating Chuck and Machida beyond the repeated injuries finally robbed him off his best form.
Not top 5 all time I'd agree as he didn't have enough of his best form but I'd have no problem calling him a legend.
I put him on par with someone like Rashad only with a much shorter prime