Come on now, Max Verstappen would be perfect for that seat. Hamilton needs some competition to bring out the best in him. The thing is, if those two have equal equipment, how long would Hamilton remain the number one driver? That might damage Hamilton's confidence if he was pushed to number two status, or it could push him to the level of one of the greats. I don't think he has reached that level yet. As long as he has equipment that is better than his competition, by a large margin, (compared to the rest of the field) he will never reach that level. This is only my opinion, and I am often wrong. I believe that being in the discussion of "greatest ever" is what motivates him. The cost would be astronomical, but to have a true battle at the front of the field, as opposed to who gets the best start winning the race, would bring back some interest in F1. Not much chance of that happening, but a man must have his dreams.