Apothecary being scum is unlikely. He hammered in a either or scenario.
PimHel is less likely scum as he started the momentum of the BA wagon and didn't change, as well as swapping off Bulvox at the start and showing legit concern after the hammer pre-reveal (weaker, but in combo with the rest...)
I guess I'm less clear then those two as my vote was at a more opportune time to bus, but I definitely had a lot of opportunity to swap off the wagon at the end there, especially given the fact I basically made the case on Bulvox.
That all said, looking back I forgot about Natirasha's hop off BA to Bulvox real close to dead line. FAR scummier then raider.
The scum is most likely in the group of Bulvox, raider, and natirasha just based on the wagon (Bulvox c is least likely given how BA attacked him early, but if both were scum in that scenario the cross vote is valid play). Not assured in that group, but likely. There's a chance of bussing and what not.
So, basically, the cases at hand.
Raider-
BA ignored him beyond the early game semi-random stuff, but raider attacked back a bit and still voted Bulvox
Nat-
Swapped really close to the end
BA ignored Nat when lurker attacking
Not Voting (5) - Natirasha, Apothecary, raider8169, PimHel, Bulvox