Your Ornaments & Crime has some possibilities for you. There's a Turing Machine mode built in with up to four outputs that can be quantized inside the machine. You can control it externally with the Maths module for convenience.

You can use the dual quantizer in O_C. Feed it an LFO or mix of LFOs attenuated by Maths or your A-138. You can trigger the quantizing via Pamela's New Workout running a Euclidean Rhythms pattern. Your Batumi can sync to a clock or reset from PNW, so the melody can be repeated.

In both cases, you're not having to come up with your own melodies but your system is generating them for you.