The only person I've seen lately who I've got an Avon vibe from is actually Peter Dinklage.
Love it! Too bad he's not at liberty or likely to be (I haven't read the GoT books so if GRR Martin went nuts and killed off Tyrion, please don't tell me about it.)
SyFy is very likely to cast at least a few fan-favorite actors from other shows who are currently at liberty, the likes of Ben Browder or Adam Baldwin...bigger names who are no longer young and dewy...who among that crowd might work? Any younger roles will probably be filled by cheap, pretty unknowns, that's their modus operandi.