Ok, I'll reword my question

I plan to feed algae waffers and veggies, what is a fish that will stay small, and also occasionally be a window cleaner for me? I do plan to prevent any major algae issues (if I can't prevent it, I'll fix whatever is causing it).

And just to clarify, even female dwarf gourami's would be an issue with only 1 male in the tank? I have only ever seen that multiple males cause problems

Ok, good to know about the driftwood, I pictured beaver like munching on driftwood when I saw some eat it lol