Santa. Jesus is supposed to be a pacifist and you know he likes a thicc ass, so he'd probably just lie down with his mouth open as soon as he sees santa like, "Kill me with those fat yams, daddy christmas"

Jesus said: "If anyone slaps you on the right cheek, turn to them the other cheek also". That being said I think Jesus would be bitch-slapped by Santa till his soul ascended to heaven.

Jesus would kick Santa's fat ass all the way back to the north pole

The second coming of Jesus Christ and all that it'll entail will whop Santa's jolly ass any day I'm afraid.

Santa Claus because Jesus is God's son and can't do such a thing. And he would want to make sure kids got their presents which Jesus would not agree with

Santa would mollywop Jesus upside the head with one of those giant candy canes, then put a clown suit on him and stuff him down a chimney

I think history has already answered that question. xD

Lord Jeebus

Santa would gobble up Jesus' skinny ass in 2 sec

Jesus with ease.

Both immortals seem unfit for such a contest, don't you think?