I'd also suggest the Crowther Audio Prunes and Custard - it only does a couple of sounds, but it can sound amazingly synthy. No tracking or latency and because you can blend in some clean mix, and because of the way the filter reacts, you can accentuate certain parts of baselines which poke through the synth sound. It's so natural to play and hugely responsive to touch.. play super light and it's a warm 'whomp', dig in and it splutters.
Quick demo here