panda cories and three spot gouramies because when i was 6 i had a bad heater screw up and it boiled most of my fish. the 2 kinds that survived were a three spot gourami and my panda cories. tough as nails those fish were, they lasted for quite a while after that too.
I owned a Red volitans Lion fish for 8 years he grew to the size of a basket ball in a 150 with a great foot print (Like 3 1/2 feet front to back). He loved his silver sides. And I will admit I cried when he passed away.