I built a module based on a small microcontroller. Has 2 PWM inputs (2 channels), 4 separate MOSFET-driven outputs and two WS2812 (or similar) outputs. I don't have a picture of the current version that integrates an additional 5V buck converter for the LED strings, but here's an earlier rev with dual 6V regulators for the other 4 channels.
Video of example in use: https://youtu.be/tlSBbWml3F8