Other good exercises: hollow man, leg lifts, assisted pull ups.

I especially love assisted pull ups because pull ups are great but my wrists and elbows are shot from years of manual labor. You don’t need a fancy machine either, you can stretch a resistance band between two handles on a cable machine and use that to support your feet. I love that set up because you have to engage your core and legs just get any “assist”

Also if you can’t do a pull up, static holds are apparently very good although I always forget about them lol.