When we were first getting really into animal intelligence in the 70s at least it was fuck-huge ones.

Like, okay maybe elephants were a little human-like in brainpower, but one of them was as massive as a whole rural high school graduating class. Whales? Fuck outta here!

You could maybe match a human with four gorillas, but at that weight you could get eight humans, bottlenose dolphins were like 3 each.

Cephalopods and corvids, tho… I get the sense if you could get like 220 lb of ravens or octopuses together, they could maybe hold their own with an average person