random events dont cause OOS, we were getting them before when we turned them off, and have played many games getting events without OOS.
the options ive found yield very few OOS are:
No Barbarians (would be nice if no barbarians meant no barbatos either, as i think he causes OOS like other barbs)
No leaders with Barbarian trait, Charismatic, and Insane
No leaders with chaos mana (mutants going barbarian triggers OOS i think; tho this doesnt stop non-chaos mana civs from turning mutant, but thats hopefully fixed soon)
a 2v2ai game
Hallowed ground
All debug options except No Events
with those settings we seem to only get OOS from combat sometimes, and very sparingly from something the AI does on its turn that isn't combat