Squats on a smith machine with your feet positioned slightly in front of you so your knees don't extend past your toes. Your gluts will be maximally stimulated on the bottom half of the squat. If you're tall with a high center of gravity & longer distances between joints, only come up about 3/4 of the way / EI don't "lock out" the squat between reps. This will keep maximum tension on the muscles being worked. You can do something similar on a leg press by placing your feet high up on the pad and coming down with the deepest range of motion you can safely do, and again, 3/4 the way up, though your results will likely be better on the squat. A leg press isn't a natural movement. Squatting is.
I'd rather go deep on a good angled hack.
That would work too.
I think thats the key here.
Get deeper.