Regarding the OP, I could care less about what Kobe has to say about Dwight. I know and everyone knows Dwight is a tool but he is the most talented big man tool in the league and when 100% healthy, is one of THE most dominant forces in this league.
Kobe is also a tool. I could care less how competitive he is or how much of a warrior he is. He's a tool and he doesn't win a single ring without playing alongside two of the best big men in the game over the last 20 years in Gasol and Shaq. The guy is a massive chucker who has turned one of the best PGs of this generation into a role playing, occasional, shooter and one of the best big men of this era into a screen setter so Kobe can continue to put up his 30 PPG.
They deserve each other and I hope neither wins a ring anytime soon or ever.
Shaq yes, but Gasol is not one of the best big men of the last 20 years.
Sure he is. There's Shaq, TD, KG, Dwight and Gasol.
I think Hakeem, Robinson, Barkley, and Malone were too much in decline and/or didn't play well enough, long enough in the era to consider them.
Hakeem, Robinson, Barkley & Malone all won NBA MVP trophies in the last 20 years. As did Nowitzki, Duncan, Shaq, and KG. Pau hasn't even been an all-NBA first teamer in his career.
Additionally, there's also Alonzo Mourning, Chris Webber, Mutombo, Rasheed/Ben Wallace, Amare, Yao, Bosh, Howard...
I guess it just depends how many people you'd be willing to define "[one of] the best big men of the past 20 years".