I understand your concern, but that is one of the things about this hobby. You really can't have it all in "one" tank.
If you like a particular kind of animal whether fish or invert you have to decide what kind of home you're going to create for them. That's why many of us have separate tanks to feed our need to enjoy different animals.
The question you pose is a good one and I'm sure as you research the different animals you like and who and what they are compatible with, you'll reach a personal compromise on what you want in your 90.
By the way, even though research may say, this goes with that or doesn't, the animals don't always know what the research says and they do their own thing anyway.
Good Luck and let us know what you decide.