As usual I'm only watching one show this season.

Yasei no Last Boss ga Arawareta! | A Wild Last Boss Appeared!

MC is one of the top players of their MMO. Having just completed a user event where they posed their character as the world conquering villain and were defeated (for the good of the server as they had actually unified the continent, stagnating gameplay), they find themselves transmigrated into the game world as their Last Boss tier character, shenanigans ensue.

I've read the excellent novel in its entirety (it's even fully released in English) and I'm following around with the manga version already, so this is a welcome adaptation. The series itself feels like it starts a little generic but I promise just give it a little time and it shows its quality (and insanity).