I was going to suggest an Isolette I as well. I picked up the cheapest model, with an Agnar 85mm f:4.5 (stops down to f:32) and a Vario shutter (speeds of 1/200, 1/25, 1/50, or B) yesterday. Jurgen Kreckel in Pennsylvania works on these, and informs me that this cheapest version still has a good lens and that the Vario shutter stays accurate because it has so few moving parts. I picked mine up yesterday for well under $10. Can't say exactly, as I got it with a very clean 6x7 color enlarger and 75mm enlarging lens for just over $30.
I don't know how Holga-like the lens is yet. I have negatives nearly dry as I type. Jurgen says to expect it to perform pretty well. Add about 12mm to the height of a Bessa L 35mm body and you have the size of the folded Isolette. It also has a nice set of marks for hyperfocal distance and for 8ft-through-16ft focus for fast pre-focus shooting, and a good DOF scale. Focus scale down to 3 ft. (Mine's a US market version, no metric distance scale.)
You have to expect pinholes in the Isolette bellows, which you can either patch yourself or have replaced. Mine has a couple of very small ones at a seam. If my negs look good, I'll have the bellows replaced and a CLA, and this camera will fit in a pocket or a corner of the camera bag and go for another 50 years.
Info on Isolettes at: www.certo6.com
Fits the "not-a-Holga" and "more control" requirements.