I can rehome a buddy's oscar, but he's a beast already.. about 9"
I talked to another guy who wanted to give away a really good looking oscar for free, but he's 12".
I also really like the severums and found some awesome looking ones cheap. I would want 1 or 2 (but I feel like 2 is out of the question).
The ones I found were 4" - 5" or so.
Right now the tank just has my hi-fin spotted pleco in it. He's about 6".
Can an oscar and a severum fit in a 75 gal
? Bad idea? Pushin it?