Collect OT-only SW is the answer - no PT, no Disney SW, no Marvel, no DC, no Potter or LOTR, no "cinema icons," etc etc (I'm not 100% on this: I do have 25 Raiders/Indy figs) - that's how you can have a "all the Hasbro variants" display in 1/6.
It will still add up to 200+ figs, but I manage to keep all of that displayed in one room with only a couple of cabinets slightly more crowded than I'd like. And yes, I have LOTS of Hasbro-esque variants (5-6 R2s, 4 C3POs, 3 Chewies, 5 snowies, 4 Tuskens, 5 Vaders, 4 Bobas, 10 Leias, more than 20 Lukes, pretty much every imperial trooper/officer variant no matter how minor, etc.)