Asmodeus 21
Avandra 20
Bahamut 14
Bane 4
Corellon 17
Erathis 20
Gruumsh 18
Ioun 18
Kord 18
Lolth 19
Melora 20
Moradin 17
Pelor 19
Raven Queen 20
Sehanine 21
Tharizdun 17
Tiamat 22
Torog 21
Vecna 17
Zehir 17
Lolth was tied for highest score among the already-loser deities when I was writing this, downvote. Tiebreaker with Tiamat (upvoted just before I posted) was that if either of the two should have multiple bites at the apple, it's the one with five heads.
Torog's upvote is for not being a retread.