Rodinal at 1+100, stand developing for an hour
Stand development forgives a lot of metering mistakes, which is exactly why I keep coming back to it on overcast days. An hour at room temperature, one inversion at the ten minute mark, and the highlights stay controlled even when three frames on the same roll were shot two stops apart.
The trade-off is grain. It's coarser than a normal 1+50 dilution, and on 400-speed stock it starts to look gritty past a 6x enlargement. Fine for contact sheets, less fine for the one frame I actually wanted to print big.