Varanas are monkey-like humanoids that require a little work to fill in as wookies. Sasquatch are a better fit for wookies, but as a monster, are harder to fit into a game.
It really depends on what you want. Sasquatches certainly have the look and feel of Wookies, but they are extremely strong, possibly too strong, and they have a high level adjustment.
I like the idea of re-fluffing the Orc. Or just make up a race using the race builder rules from ARG.