Inspired by Zack's reconfigurable jumper holder and vanilla_chief's vertical jumper holder, here's one that combines both.

Uses M3 screws and nuts to connect the pieces together. Print at least one base, two combs and two extenders. Personally I went with two combs for shorter wires, and three for longer ones so they stay a bit more neatly organized. You may need to use a flexible screwdriver extension to reach the screws.

I recommend using the smaller extender between base and the first comb, but for the others it's worth measuring your jumper wires and selecting accordingly.

When measuring, mind you that each comb is 8mm thick and you should add that length for each comb, with the exception of the bottom most one that only adds 4mm (since the comb part is 8mm thick but the comb strands are only 4mm and aligned to the top of the part)