I was going to suggest that lion man figure from Papo as well. Might look nice above the horseshoe or even the center ramp. Probably wouldn't obstruct any views in either of those locations. You could always add a few other figures from that Papo mutant collection. Tiger man and the dragon man mutant look pretty cool:

http://www.growingtreetoys.com/img/cache/product/024156__.jpg

You could get out the Dremel and do a torso mount. You'd probably also have to cut off the lower end of the axe as well (which would still look fine), so that it doesn't hang down and disrupt your pf. Just a thought if you really like the toy and are looking for a project.

Ha! Nice, I think it looks pretty good in there. Not a lot of room to work with in most of those older machines.