Not just size, but olineman with big frames that can add weight without becoming a disgusting fat body that can't get out of their stance.Heavyweights fight heavyweights for a reason. Now we just need their tenacity to match and for them to play up to their size.
And just to add to your point, willing to bet a few of them aren’t even 6’3. I automatically take 1” off on players from their listed height, especially OL/DL. I bet you Clark is closer to 6’1 than 6’3, and Seymore aint 6’2.