Talent wise IMO right now he is.
Nogueira looked horrible. Arlovski's ground game is crap, Barnett has good hands all around I think Overeem is better, Mir still hasn't proven that he is a great striker or really great anywhere although it was a great performance, Lesnar is too raw, Couture has no power or submission skills, Gonzaga has bad hands, Werdum has average stand up, Cain is too raw.
So yea talent wise he is probably #2 he needs to put it all together though and stop choking.
Not only is he amazingly skilled but at 6'5 he's a big HW and he keeps getting bigger and bigger.