Who are the "Champions" of the Grandmaster before and after The Incredible Hulk?

 If we take a glance at the statues being built into Grandmaster's tower , we can see that they were actually erected to honor the former champions of the Contest of Champions .                                      

Hulk's head is obviously constructed as he is the current champion . But , if we see the other heads , we can see : 

1 . Ares - God of War on top right .

2 . Beta Ray Bill - The Korbinite on top left .

 3 . Bi - Beast - The two headed android at bottom right .

4 . Dark Crawler - on the bottom right 

5 . Man Thing - The guardian of the Nexus of all realities at very bottom .