Any Ensign would suit, but look for one that uses the lovely Ross xpress lens, I have 4, the Commando with a built in rangefinder and the ensar lens, selfix 12/20.820 and 16/20, all with the xpress lens, then there are the Ikonta's, the Ikonta B can be picked up for peanuts, another exelent folder is a Blda Super Baldax, with built in copled rangefinder, and I am only making suggestion's from my own collection, all of which I use and take fine negatives.
Richard