Opinions on alchemy seem pretty split as a solid generalist vs just lousy at everything. Interesting, if slightly concerning.
Rogue was always a favorite of mine from back in the day of actual dnd (before i decided i liked pathfinder better), and unchained did some really neat things for making their skill points really DO something. Are you suggesting rogue base+caster progression or caster base+rogue progression? Also I don't know about you guys, but rogues always seem to be a source of friction at my own tables or those nearby. Especially when lawful good anyone is involved (contrary to popular beleif its not just paladins!) Any ideas to overcome that?
As for the other popular option, druids, how do you feel about the blanket ban on metals? Seems concerning to me (for melee) unless you want to go with unarmed natural weapons monk build.
Oh and just to confirm what most have already assumed: the conceit of the thread accepts by default that the character wont be the best at anything as long as they can choose to be good ENOUGH at anything. It is NOT required to be able to fill all roles all the time, though that is a pleasant bonus. The idea is to start off being able to do anything, and then just focus on filling whatever gap the party happens to have.