I think that would be okay. I wouldn't do the Senegal, though, because I feel like it would get bullied or eaten. Perhaps I would be wrong, but that's just my gut, lol.
Albino Senegal can definitely be eaten by the Oscar’s as they usually max out at 7-8 inches due to inbreeding. The bichirs could also be outcompeted for food because of the Oscar’s voracious appetite. I don’t know that much about pseudopimelodus bufonius. Make sure you do have adequate filters because Oscar’s have a massive bioload.
The last couple I've owned got to about 10 to 12 inches
Really? That’s interesting. I’ve heard several reports here about them only getting 7-8 inches big and my own albino Senegal seems to have plateaud at around 8 inches. I guess some do have pretty good genes still.
