My oscar is very calm and doesn't really pay any attention to the other fish with him (being a bala shark, Jack Dempsey, and rubber lip pleco).
View attachment 800503 this is mine.. About 7 years old and 16 inches..
You shouldn't have to wait long, Mine is currently 18 or so inches at 3 or 4 years old. Dropped him when moving tanks, almost killed it damaged it's tail and made it bleed. Worst day of my fishkeeping life. However 8 months later and he's eating out of my hand. Love this guy'/gal. but he's very shy. Also Very badass
I'll post some pics later