Enter the Gungeon is a great game. I got pretty deep into that game when it first came out on Steam and got the ending for several characters to unlock Bullet Hell. I never beat Bullet Hell, but it was mostly because at that point I already had 80+ hours on the game and I'm assuming something else came along to steal my time.
I enjoyed Bayonetta, but I can see why it wouldn't be a match for some people. I would compare it to God of War in terms of playstyle; it's also quite difficult. It's very over-the-top and it never takes itself too seriously, and the game is divided into levels which take maybe 30 minutes each at the most (it's been awhile so I could be off).
Some people had mentioned Xenoblade Chronicles 2; I still need to finish this one myself, but I made it quite far and I did enjoy it immensely. The game is very fun, but I'd say that it lacks polish in my ways, like performance and character/camera movement. It's excusable for an RPG, but as a AAA game I was expecting a bit more polish.
You can always play the other FF games if you haven't already.