The Warworld Saga is the most magnificent main continuity arc Superman has had in two decades (rivaled only by Tomasi/Gleason's
Rebirth imo), so yes, that is absolutely it for me. It's like if the original Mongul arc was actually awesome.
BUT ALSO, more people should read Peter Tomasi's two-part Mongul solo story from
Showcase '95 called "Exit to Eden." Seriously under-appreciated little gem, imo. Even though that was technically current Mongul's predecessor, they all represent the same ideas really.
Mongul's extremely compelling to me because he basically represents the nightmare scenario of where everyone worshiping Superman for all the wrong reasons (his powers and ability to win every fight) could lead, and how terrifying that can be as a predominant worldview, beyond what we've seen on Earth. Mongul's power fantasy is
literally a religion to the people of Warworld, and PKJ does a great job fleshing out what kind of society that could really create. Watching Superman choose to give up his power, be willing to lose and even die repeatedly just to show these people one-by-one where their real value lies is one of the most inspiring things I've ever seen the character do.
Also, Warworld Saga's \S/ wasn't
just the Kingdom Come/Authority \S/...