Several of the various drywall anchor/fasteners will hold quite a lot of weight if properly installed in walls in good condition. In my 60+ year old house, much of the drywall itself is in such questionable shape that every hanging is a "significant event" requiring structural assays and "site specific" selection of the right style and size of anchor for each project.

Fortunately, for now the local hardware merchants offer a wide variety of kinds; although some of the more "exotic" ones seem to come and go at random times, so that it's often hard to find one that worked well even 4 or 5 years ago. Toggle-bolts and Molly's seem to have persisted for long enough to be almost always easily available, although some sizes may be harder to find when you want another one - but of course reappear just after you've used something else.

John