I'm starting to doubt the fact that cfg-Loader (the one I use) is good at all, with all sorts of recommendations like WiiFlow and USB Loader GX.
Any suggestions? cfg-Loader is user-friendly, USB Loader GX I found hard to set up with lots of crashes while WiiFlow I have not tested yet.
EDIT: My requirements are USB WBFS loading and SD Fat32 GCN loading.