Without a doubt the double bass. In almost any genre. Jazz, blues, hillbilly, rockabilly and even punk and metal, wich basically gives you psychobilly.
Lee Rocker is the one who made me see the light.

Tablas.....h just kidding.

Trumpet by far. Theres nothing like a screaming over the rest of the band.
Horning clavinet.Funky.
Wurlitzer
Vibes

Guitar, it's pretty versatile.