Well, as long as Nole, Rafa, Fed, and Murray are around, the max Tsonga will go is #5. When 2/4 are gone then it's possible. The problem for Tsonga right now, is sometimes he doesn't show up for matches. An example is at the Aussie Open, he lost to Nishikori where it looked like for the most part he didn't care.
Also, I can almost gurantee that Fed makes the finals for Wimbledon. He is the king of grass and he's been playing his best tennis since the 2010 Aussie Open.