Hmmmm, I don't play that much anymore, but at band practice last night I got to have a go on the bass with my pedalboard, and the slap tone was amazing. That's some compression blended with some OD limited and blended with some clean. So much punch, but the hard attack of the slap gets eaten by the OD and limiting which makes it bite loads without the peaks, which in turn means you can actually hear the notes and note just clunk clank clunk clank.
I guess if you're into clean sounds then you should be able to get the tone with just touch control alone, although that must take a fair ammount of practice!