I just got a Bumble Fuzz, really by mistake as Prymaxe had it listed in my overdrive query, but it's a very happy mistake. With the drive all the way down and the excellent clean circuit it does work as an overdrive, albeit a pretty fizzy one.
As a fuzz it's great, the tone knob changes the character as well as EQ of the fuzz signal in a great way, and the clean is the best clean of all of my pedals. I greatly prefer a clean volume plus a distorted volume (or gain, or whatever the designer might call it) rather than a blend knob. Just my preference.
Which brings me back to the TAFM. You should check this one out, very versatile and sounds fantastic. Unless you are dead set on a Muff, you might like the TAFM.