Here's my (still work in progress) version of Walter Langkowski (the man who would be Sasquatch)... still have some ideas to iron out, but have tried to create the man who transforms into Big Ginger :)
Plan is to have an alternative alias for Sasquatch (which will be the mutagen form of Langkowski and will detail all abilities etc in full) - with the added rankle that in becoming such a brute he's opened the door to a powerful ancient spirit - which he now attempts to keep in check whilst continuing to harness the power of his mutagen form)
Have been somewhat inspired by Gyr's Snowbird and tried to capture the flavour of the character and Golarian - still stumped at some options, but as always open to comments and notions folks.