I happen to like power trip fantasies because 2020 has been a garbage hellscape and it's nice to watch some escapism.
I wouldn't necessarily call Tanya the Evil OP, but she does get very powerful. Overlord is a great anime and I'm kinda scared what they're gonna be doing going forward. Slime-san is similar to Overlord in certain ways but definitely zigs when Overlord zags, I just wish Slime-san would get on with the main plot already.
Never seen Devil is a Part-Timer, I'll add that to my queue.