Ever since I joined the Tom Petty tribute band I've never used a pick so much in my life, and my choice has been the Dunlop Big Stubby 2.0mm pick. Made of lexan, it's the least clacky pick I've been able to find. As per a tip I got from Jimmy M last year, I just turn down the tone a bit, and it's almost completely noiseless.
Hofner Group #34, Canadian Club #137, Le Club des Francophones No. 12, Straight-Forward Bassist club #4, Squier Affinity Club #11, 50+ Club #16. Go in, lay it down, and get out.