I dunno, having a reasonable authority figure seems pretty workable to me. My current game has a couple, and that's worked out fine. The key, when dealing with the existence of such figures, is twofold:
1: Remember that 'friendly, reasonable, and likes the PCs' does not mean they aren't a threat.
For example, a Warlord (Dictator) can be nice as pie as long as you acknowledge their authority and do what they say. Of course, what they do to people who don't acknowledge their authority might not bear too much thinking on...and they're likely to make demands of the PCs to boot. Asking the PCs to go fight in a war for you is every bit as much of a threat to them as attacking them, demanding that they pay taxes is every bit as much a threat as stealing from them, and requiring that they follow laws is not exactly non-threatening either.
For another example from my most recent game, one of my PCs took a lover, a member of her gang who was utterly devoted to her (and part of her gang's Threat-type as a Family). Loyal beyond reason and willing to do anything for her. The PC had to restrain her from killing anyone who looked at her sideways. She killed several people the PC didn't want, as well as almost killing many more. Love and devotion don't make someone not a threat to peace, stability, and other things.
2: External and internal threats other than the leader. If the PCs want a reasonable leader, more power to them. But that doesn't mean anyone else does. Usurpers, enemy warlords, the relatives of the people she killed to get the job might easily feel the need to be rid of her, and take steps in that direction. Everyone wants a piece of the hardholder...and if the hardholder is an NPC, they're very fragile since you're looking at them through crosshairs, so they'll likely need the aid of the PCs to protect their position or they'll lose it and die. Having the PCs desperately try and prop up a particular status quo in Apocalypse World, despite the nature of the world fighting that idea, is an excellent source of plot and drama.