I use a Gerber. Got this set from Bi-Mart right before Gerber became Fiskars, or whatever they are now. It's a downright shame. The skinner has a 3 1/2 inch blade, with a 3 inch useful cutting length. These are them until something bad happens to one.
I used to carry an O. K. Olsen. Nice heavy knife. I let my brother taslk me out of that one.

They are no longer in business. You can find them used on E-Bay for a lot more than they were back in the late 70's.
I think a W. R. Case skinner with the stacked leather handle would be a good knife. It looks like the old Marbles knives. I don't know if Marbles even makes knives anymore.