Prehistoric megafaunal mammals

I interrupt the dinosaur routine to offer a little variety of mamifera, three prehistoric titans in their respective group, time and place.

Paraceratherium, a tall hornless rhino relative and one of the largest land mammals that have existed, a little crappy Doedicurus, the largest glyptodont, and elephant-sized ground sloths Megatherium and the more tropical Eremotherium, which this last one I have chosen to draw without hair.
I have found it a bit strange that people always do always ground sloths very hairy (at least those that lives in more warm areas), I understand that it has found remnants of hair in other species as well climate would have played a major role, however those samples came from species not greater than a ton, it would seem plausible that the largest individuals would be pretty hairless (unless there is evidence that contradict what I'm saying).

Middle left: Size comparison of each other and with 1.8 meter tall human
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Edit: I added the hairy version of Megatherium, and this hairless version is going to become its northern counterpart, Eremotherium, After the talk in some comments about the distribution of ground sloth species.
Added size comparison