Well, the OP did say "BEST"... and I would say the best is the Amazon river basin.
I do not consider "best" and "minimum" as synonymous.
But let's dismiss “BEST” and substitute "good"
I would say a 120 gal + would be good... I'm thinking either a 4' 120 (4' x 2' footprint) or a 5' 120 (5' x 18" footprint)...
I would say a 90 gal (4' x 18" footprint) would be okay... and I would consider okay synonymous with minimum...
PS - please do not type in all caps unless you intend for your message to be read as you yelling at someone. I know some people prefer all caps, but local forum etiquette saves all caps for yelling.