Norm Macdonald -- Aaron Hernandez is WORSE Than OJ

OJ Simpson may NOT be the biggest villain in sports history ... so says Norm Macdonald who tells TMZ Sports Aaron Hernandez has him beat -- but there's one guy who stands high above them BOTH.

Macdonald was at LAX when we told him that Hernandez was indicted for two murders for this morning -- to which Norm replied, "GOOD LORD, that's just murdering for murder's sake at this point."