I don't slap, but if I were to, I'd try one of the long scale, bolt-on neck, maple bodied Gibsons... probably a G3 or Victory - they are NOTHING like the EB/tbird/LP basses that most people associate with Gibson... ie no mahogany, no short scale, no overwound humbuckers - the Victory Artist is active too (with a passive mode) and I suspect would give you exactly what you want. But to be fair these are the least Gibsony Gibsons....