Good point. Maybe a common would be the best choice as they grow fast as well or an L001(goldspot), these have loads of character.Something like a Hypostomus might be a good start. Don't get quite as large as Commons but do get large enough to coexist with Oscars.
Carnivorous plecs don't necessarily do well with large carnivorous cichlids despite the diet compatibility. The reason for this is that the large cichlids are typically ravenous eaters while plecs in general are not as outgoing feeders. What often occurs in this situation is that the cichlids eat the food intended for the plecs. A better fit is a omnivore who can hold its own with the cichlids. Being omnivores they can take some meaty foods without a great risk of intestinal distress & you can supplement their feedings with veggies with less risk of the cichlids eating the veggies.
They're in the same family as a Common but get larger. If you want a similar one, L001, as Lisa recommended might be something to look at.what about a sailfin pleco? are these suitable?
L001 only get in the 12" (30cm) range and grow a bit slower than Commons or Sailfins/Gibbys.so that would outgrow the tank quite quickly then? yeah ill have a look at L001s, they do look very nice. and they dont grow as big as the commons?