A used W RB Star would be fantastic, but they're a bit like rocking horse do-do. Ideal body shape, twin pickups, etc.
The G4M looks like a bit of a Star, long scale, and importantly, won't break the bank. It could potentially be upgraded with Warwick pickups & decent pots etc. too.
I accept the pickup "problem", however, my main bass has a similar "issue" (see avatar), and it's far from sonically limited.