I can see you know little about mma considering the first fighter you mentioned is a bum thats in his 40's and the second photo with GSP isn't even his weight class.
Enough with Kimbo already he's just a youtube video fighter. Why do you think you don't see him in the UFC these days? Because 80% of the fighters in the heavyweight division will destroy him. Kimbo isn't a mixed fighter he's just a puncher. Considering 95% of fights go to the ground at some point he stands no chance in the UFC. Why do you think all his youtube fights have the rules no grappling and all stand up? Because he blows at everything else.