Tawodi, Mr. Baird, and Joan McGruder are obvious contenders, but I'd like to make the case for Pete Spence.
Yes, he's just a cheapie Dude with an ability that's narrower/weaker than Doomsday Supply, but while you have to draw each copy of Doomsday Supply seperately (which may or may not be on-value), Pete lets an Outlaw deck tutor from day 1 for a whole bunch of geared-towards-specific-opposition cards (Peacemaker, Shotgun, Tusk, Scattergun, Knight's Chasuble, Fancy New Hat, and more).
And yes, he's limited to what's in your discard pile at any given time (Travis Moone and Henry Moran may help out here), but within those limits, he can run the job in your own home just by stepping outside first, acfivate Elliot Smithson's ability immediately, and give you a head start on bounty generation.