What 3 or 4 Rokus should I test game on?

If I had to only test on 3 or 4 Roku models for a wide range of detailed performance feedback, what are a good batch of models to try?

I've tested so far:
- Roku 2 XS 3100X - my own
- Roku XD 2050X (classic) - my friend's

I'd like my game to work decently on classic Rokus (it's a throwback type game, it just makes sense!), although I may abandon this goal later if it leads to too many compromises.

Should I try streaming stick? Can streaming stick even play games? Older Roku LT? New Roku LT? New Roku 1, 2, 3? (Is the newest Roku the same as the older Roku 3?)

Thanks.