Pretty much anything by Trigger is going to be worth at least a watch through at least once, usually multiple times.
The League of Legends show, Arcane, is some of the best animation I think I've ever seen and season two comes out next month.
FLCL and FLCL Alternative are both amazing, I couldn't get into Progressive.
Mob Psycho and One Punch Man are wild rides. I think OPM is better, but that's because I'm bald.
JoJo's Bizarre Adventure is an absolute hoot if you can see the humor in all the over-explanations and goofiness
I'm about to start Dead Dead Demons Dedede Destruction tomorrow. I'm going in blind, but I really love Inio Asano's other works. Goodnight Punpun changed my life, but really, do not read it if you are already depressed.
I keep editing this because I keep remembering stuff.
Frieren is amazing and makes you feel incredibly close to these characters.
Delicious in Dungeon is Trigger, but a different Trigger than something like Kill la Kill or BNA. It's slower, comfier, and like Frieren, makes you feel SO close to these characters.