Just a few off the top of my head:
Jimmy Stewart. Clint Eastwood. John Wayne. Vincent Price.
Clint Eastwood slept around quite a bit, but not with guys.
Stewart did not marry untll age 41, having sowed many wild oats. He did then settle down.
Clint Eastwood was/is a horndog; many affairs, two divorces, many live-ins, a couple of illegitimate childen.
John Wayne, married three times, divorced twice.
Vincent Price, married three times, divorced twice.