Probably a few over the years but 2 spring to mind for the amount they consumed.
Gazza. When he was playing for us he stayed a few weeks at the Fox pub in Speke. He was great fun as you would imagine, very generous buying rounds for everyone and permanently pissed. One night in there a mate was having a retirement party and all his family were there, wife, kids , grand kids, the lot. Gazza dropped his kecks and then dunked his nob in my mates missus' drink. Hilarious until he asked her to suck it dry and then everything kicked off good style.
The second one was John Barnes who was on a stag night I went to about 20 years ago. We were in the Revolution around Bold street way on the chilly vodka shots. It was the pits. Knock it back and it feels like your stomach is exploding. Sip it and your whole mouth is on fire. For a bet, John Barnes knocked back 10 chilly vodkas, one after the other, then carried on drinking as if nothing had happened.