Fuzzrocious Grey Stache
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FUZZROCIOUS PEDALS
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Fuzzrocious club
Also, the B:assmaster (Geranium) is pretty meaty. And... so is the Blackout effects Musket Fuzz. Blueberry fuzz... dude, the list is endless.
Basicly any Fuzz for bass will give you the sound you're after. It's just trying them out and watching demos to see which one has that certain flavor you're after. There are literally endless fuzz options out there.
Distortion will be more like a Rat pedal. You will loose a lot of low end and get more of a static-like tone. If you want low end, chest pounding, face melting tone... go fuzz.