Jerry Coyne is following the competition.
Estimate of God’s killings ranged from 2,476,636 to 24,634,205 and counting. On the other hand, Satan has only 10 confirmed kills-that’s due to a bet with God-and 50 unconfirmed kills. See the breakdown of God’s killings here.
The Christian God, if he existed, is by far the better killer, hands down.