Brock Yates would be awesome, too. Wasn't he involved with cannonball racing back in the day?
Paul Tracy is too homosexual for the show. You know it, I know it, and the American people know it. Perhaps if all they asked him to do were to wreck, then he might have a shot.
Alex Roy might be cool, but he doesn't really fit the TG profile either.
For one, we need an automotive JOURNALIST that's free to give his opinions at-will. Since this is America, land of the free and home of the sponsors, you can bet automakers will be involved with sponsoring the program and free from "bad press." Especially domestic makers. They know they're losing, they also know why. Above all else, they don't want to be reminded why every time they turn on the program they paid for. This, most-likely, won't happen.
Then you've got your fun loving, automotive informed, TV personality. This would be Richard's job, and I assume Adam's filling this slot.
As for James May, well, you need a man that's classically trained in the finer things in life, yet understands and appreciates the technical aspects of cars today. Getting lost in traffic would be a bonus, too. Some one that is detail-oriented to the point of being considered "anal."
As for Tanner being the Stig, forget it. You've seen how tight-lipped the shows been about the Stigs identity. To announce Tanner and 3 hosts would surely ruin the name. You need an American driver that's retired, yet still fast as hell!
Forget finding James' "clone", good luck on that last one. I recommend most any driver from CART/IRL/WHATEVERITSCALLEDTHESEDAYS, other than Andretti. I just hate that guy, that's all.