As tough as it is to pick only 3, here goes.
1) Mark Cornelius cherry crystal over glass. I'm actually NOT much of a crystal guy but the turkeys I've been hunting the last few years (VA, MD and PA) absolutely love this call!
2) Cody Spec 1 slate. Old habits die hard. I've called more birds to the gun with this call than any other pot call in my arsenal, enough said.
3) Roger Parks Gobbler Call. The most versatile call I've ever ran. Soft and sweet, loud and demanding, hen or gobbler, this thing does it all and turkeys love it. Jake and gobbler sounds can be certain death in the Spring.