Nuxl - A fairly weak chance. Jailkeeper is powerful enough as it is.
Psy - 1% chance. Role has been wiped and strongman kills have happened since then. Dependent on Psy/realiti/Ryo scumteam lying about a wiper.
Realiti - See Psy
Ryo - See Psy
shadow - A fairly weak chance. Mafia Cupid is powerful enough as it is.
Spiderz - N/A
Texas - An ok chance. Once he finds Haruno he's a redirector that would be dependent on a townie to agree with him. Having a useful passive would be valid on the side of this.
Sam - A very low chance. Inheriting the vig is kinda bonkers for scum.
Vizh - A fairly strong chance. Challenge setter is nigh useless for scum outside of engineering tasks that scum specifically are good at in order to secure extra votes in lategame. A powerful passive would be a must.
Whydon - An ok chance. A killpower-focused role works flavour-wise, where it kills anyone that targets him and also powers through protection. The mafia version of this role is
Paranoid Gun Owner and is apparently more often town than scum but not exclusively town, and is considered an anti-town role in game design.