You can argue LB zeus strongest than Morgan but forget the fact despite his full power he still ran away from Alien God. In term of character itself Zeus is arrogant to the point Morgan can exploit that weakness and destroy him with Rhongomyniad.
You actually can't argue it. Zeus was planning on running away as a whole from the Foreign God, Rhongomyniad explicitly is seen by Sion and Trismegius II as the only option to deal with the Foreign God(With Excalibur being the other one). This is TvTropes level of delusion to pretend Zeus is a threat to Morgan especially as he tends to not go full out unless the person is stupidly flexing early.
Whole damn thread is Ainz wanking to the max with anyone saying otherwise getting downvoted hard, jesus christ...