You’ll have to take that up with Mr. Lehrer. 
Osama, and the dog from Duck Hunt.
Dear OP,
I don’t know how much of your wish for trophies stems from wanting to impress the ladies. But I can tell you that if I were to visit your house and saw these heads on your walls, I’d be gone about as fast as when you proudly showed me your “Silence of the Lambs”-style women costume made from the skins of real women.
Yours,
Maastricht.
Bonus! You wouldn’t have to hollow it out first!
I would have gone with either GWB or someone like Jack Welch.
Karl Rove & Rush Limbaugh.
I might need a bigger wall though…
Chupacabra
Skunk Ape
Gumberoo
'Hinder
Squonk
The wall is the best place to mount a target.
No heads. Just a mutha rack of antlers to hang my hat collection.
OK, a crockigator head would be cool. Showing his teeth of course.
I could mount the antlers to the croc, thereby creating a crocobuck, crocomoose, or elkigator.
Aaaaaand an elephant’s foot table for cocktails, complete with a flexible trunk to hold your glass.
And a jar of dog paws, so I’ll have a place to rot if I ever swap God for a janitor.
The OP’s would do nicely. Provided the room was in the basement. Or out in the garage.
I think macho male behaviors like this are intended to impress other males. Certain types of male acquaintances, at least.
(FTR I’m male and I’d be disgusted too.)
Uh, a billi-ard?