I guess my 120g stocking list may help:
2 clownfish
1 Scopas Tang
1 one-spot foxface
2 firefish
1 tailspot blenny
1 coral beauty
5 anthias
1 lawnmower blenny
1 chromis
there are some cheaper, smaller fish that are fun to watch in the big tank, they’re out way more than they used to be in my smaller 35g tank.
as far an a number as long as they’re all peaceful, there is plenty of habitat and food and you keep up with maintenance then you could fit a lot of fish.