(I know this is a thread necro but since it hasn't been brought up yet, I do love throwing my two cents in)
Alchemist with the infusion discovery and invests in Ring Gates is my personal vote for laziest character. Can even take the Oenopion Researcher archetype to hand out mutagen.
It's basically the stay at home wizard but rather than actively having to cast spells, the alchemist simply hands out infusions as needed and can even chuck bombs if they so choose.
Infusions have to be prepared like wizard spells do, but once prepared the drinker simply needs to drink it. Nothing on the alchemist's part is needed.
The mutagen (with the oenopion researcher achetype) can be prepared beforehand as well.
Any number of bombs can be made by the alchemist beforehand, so on any given adventuring day the alchemist doesn't have to actually make any; if they're at home they can just use some overstock.