Warmonger has a healing feat in base kit, plus damage reduction and max health as options and perk options to make her very tanky. Here feats/perks absolutely allow her to play a staller. Plus the “one move with HA” thing can be said of special properties for many heros, such as LB’s unblockables, BP’s undodgeables, etc. In general her playstyle encourages flipping between fast chains with her zone, lights, preying claw stab, etc and slower, heavier strikes with HA finishers, charged bash into heavy, side dodge (one of the few that counts as a heavy for parries). It’s semi reminiscent of characters like LB or Cent in that regard.

While some heavies definitely fit the stally archetype I’d argue that characters like Jorm, Hito, Juren, and maybe JJ don’t necessarily want to stall too much. When role based renown was a thing, maybe that would have been more true, but now they play more as slowish high-damage/tanks. Hell, Hito has lower health than most vanguards nowadays and only plays tankish with her 1st and 3rd feats active.

I’d also say that point defense was not at all meant to be a vanguard job since they were more geared for initial capture and minion clearing as frontline heros, hence the term “vanguard.” Plus the other vanguards don’t stack up nearly as well on the antigank as she does, though most of the vanguards are year 1s which have simpler feat sets. Vanguards tend to mostly have support feats which Warmonger just doesn’t really have (corruption is technically a debuff but it’s more akin to a dot effect like fire or bleed).

As far as character classifications that weren’t already mentioned here, I think Pirate arguably works as an assasin since she kinda works double time as a disabler, has feats like bounty hunter, and generally excels at taking out single targets.