the Jester
Legend
I'd probably completely custom build him as a monster inspired by character options; I find that it's simply too much effort to fully build a pc style character to use as a one-shot monster compared to how easy and fun it is to custom build monsters. (For me, at least.)
If you surround him with allies (minion and otherwise), you could give him an aura with something like "aura 5; a living ally that dies in the aura rises as a lvl x undead minion at the start of its next turn as a free action". That's a cool way to double your minion utility!
EDIT: To be clear, "one-shot" as in "one-shot before you have to rewrite his stat block".
If you surround him with allies (minion and otherwise), you could give him an aura with something like "aura 5; a living ally that dies in the aura rises as a lvl x undead minion at the start of its next turn as a free action". That's a cool way to double your minion utility!
EDIT: To be clear, "one-shot" as in "one-shot before you have to rewrite his stat block".