Monk
A single level of Mesmerist would be nice, for that swift action stare for a -2 on Will saves. Other than that, though, they really depend on their full casting and their Hex DCs, I wouldn't want to tank those. I think the typical Shaman is a spellslinger, diluting that with other classes for melee abilities is just a waste. Of course, there are also other builds that don't depend on save or suck hexes, those might benefit from other Wisdom-based classes. Warpriest for some self-buffing, and so on.