Bristol's Spud Murphy was a Tory cllr. for Avonmouth before losing his seat on the drawing of lots to Labour ex-MP Doug Naysmith.
Tim Collins is a former Avon County Cllr., first for Labour, then he defected to Conservative.
George Ferguson is a former Liberal councillor who stood for Bristol West twice for the Liberals.
Agreed, the SV system is ridiculous for a 15 candidate election. The Torbay mayoral election was similarly a farce. You just have to take a lucky guess as to who will be in the top 2!