Any title holder for unification purposes. And since Ruslan is out, and the WBC is a mess, I'd pick the winner of tonight's contest between Holyfield and Ibragimov.
Iggy vs Holy winner is as good as any. Tua, and less so Rahman, as stay busy fights vs name HWs could be interesting. Later Ruslan or Sam.
I'm fairly certain Wladimir would KO Rahman but who'd give him credit for the win since Rahman hasn't done **** since being KO'd by Maskaev - again? If Rahman just beat any top 10 guy by devastating KO or at least an easy UD then he'd be worthy.
He should do what ever is needed to unify. But he probably has to leave one title for his his brother to capture.
I voted for Ibragimov vs. Holyfield winner (though I am about 90% sure that it will be Sultan. either him or Ruslan. Unification is what matters most right now. Even if the belts don't stay combined it is a needed starting point. Wlad is too good of a fighter to not get ring champion or undisputed honors. we will see how Ibragimov draws in Russia. Then they can have a huge Ukranian vs. Russian fight in Feb. Then in the Summer... Povetkin vs. Wlad which will be even bigger. Then when Povetkin beats Wlad, he will have two belts.
Wladimir would kill Haye. He has no problems vs. smaller, fast opponents, ask Byrd, who is much harder to hit than Haye.