Most versions of Eclipso would beat Knull, some would stomp
Current JLD Eclipso hasn't even shown up yet and is already on a whole other level, literally every one of the Big Bad in JLD are casually multiversal (Hecate, Upside Down Man, Lords of Order, Eclipso, Mordru, etc)
zopzop
Eclipso is a rogue aspect of God. He demolishes Knull.