Strange how your experience of the Emerald bridge was quite different to mine. I certainly found it thick and with great tone but also rather bright.
The Mule neck is too vintage for me and I've never fancied a Riff Raff but I think Cold Sweats and Rebel Yells might suit you based on what you've just said.
Actually, I've been thinking about a rebel yell set. Would that be reasonably thinner than an Emerald set, sort of to tame the natural "fatness" of that guitar?
Basically, the way I see it, my options right now seem to be
Rebel yell set
Riff raff bridge / Riff raff neck
Riff raff bridge / Mule neck
I really liked the A4 attack and compression of the Emerald neck, just needed something with a less thick tone.
Vh2 bridge OTOH was close to perfection. But I'd want a slightly different flavor for the Marsden. Maybe even a bit brighter and slightly thinner than the Vh2