In my limited experience, I think Idaho would be where I'd put my money. That's the first place I ever heard bulls bugling, the first time I watched a spike bull tear up a tree, and the biggest bull I ever saw with a massive drop tine coming off his right side. I love hunting that state.
That being said, I was at a skull duggery place this afternoon and saw an absolute MONSTER that came out of central Oregon. MONSTER.
But Idaho tags are OTC, so that's pretty handy.