I’m looking for exercises that build multiple muscle groups

Deadlift

I dunno how bad out of shape you are, but if you’re older and chonky and haven’t lifted in a while then I’d suggest a dumbbell program for the first month (pick like 4-5 exercises per day) :

1) Push day (Chest/shoulders/triceps): Db press (flat, low incline, OHP) tricep overhead extensions/skullcrushers
2) Pull day: 1arm rows, chest supported rows, deadlifts, hammer curls, alternating arm curls
3) Legs: goblet squats, Bulgarian split squats, RDLs, lunges
4) rest day
Then repeat for a month (5 days out of 7 you’re lifting)
Pick a weight for every exercise you struggle to do 10 reps with, and do 50 total reps. When you can do 5x10 then add weight.

If you have a lot of weight to lose then just getting the motions right and getting moving and being consistent will be the important thing. DBs are safe and give a good range of motion and you’ll see fast results if you get after it.

Gymnastics rings.

Power cleans baw

get ya burpee on

Shoulder press

I actually prefer shoulder press to bench. Bench always struck me as being an unnatural movement without evolutionary precedent. Meaning it’s not a movement you would ever do much in the natural course of being a human.