Deviants are definitely smooth, especially once you break them in a bit. Good bolt lift. I've run Deviants in PRS matches plenty and never had an issue with them getting dirty and sticky, at least no more than any other action. Defiance were probably the most used action in PRS last year. The Templars are made by Defiance, and feel very similar to a Deviant. I mean, it's pretty obvious that they are just a Rebel, and the only Stiller that comes close to feeling like a Defiance is the new Spectre. The Lone Peak's are also very nice, feel a lot like Defiance.
The TL3 is also a very slick action but they can be a bit sticky when furthest out until you learn how to run them (a non-issue). TL3's also have a nice light bolt lift.
Mausingfields are smooth, but too much bolt lift now that they've ditched the 50/50 IMO. Also overpriced, even with "free" DLC, which I wouldn't want anyway.
BAT's are great, just not my thing for the kind of shooting I'm into.
You'll excuse me for being blunt, but the Tempest sucks, and the Badger feels like shit too. I also don't care for any of the 60° or 70° 3 lug BS. I don't care what trickery nonsense they try to pull the bolt lift always sucks, and being stopped short of stroke will never feel natural to me.
Lots, and lots of great customs to choose from these days. You will love whatever you choose.