IMO, there is no way that Wade, Nowitzski, McGrady, Arenas and Garnett were more dominant. On paper, they are more the ideal players considering their height coupled with their abilities, but performance wise? No way. Although when comparing personal achievements, Garnett is comparable. But I think even they would disagree with you.
Talent wise, there is noway I'd take Barkley, Nash

or Cap over him. It's hard to compare centers to guards considering guards tend to have more versatility, but I'd take AI over Olajuwan. And I might choose Shaq or Wilt simply based on the pure dominance of their positions. Jordan obviously was more talented all around, and Oscar I'm not so sure of considering I've never actually watched him play. But there really is no doubt in my mind that AI would seriously put some work on him. But I'd still stand by my statement that he is a top 10 talent...the chances of us ever seeing a player like AI again are slim to nil.