the 90mm 6.8 angulon was my go-to utra-light wide for 4x5. On 2x3 it would make a nice standard lens with a reasonable amount of movements. I have since upgraded to the 100 Wide Field Ektar, which is a beautiful, but still pretty light and compact 4x5 lens, and would give more than enough coverage for lots of movements on 6x9. My Galvin 2x3 is coming with an "astrogon" 90mm lens that is also tiny, but I can't find much info on it except it was probably made by Yamasaki. In addition there is a Nikkor M 105mm lens that is tiny, but that barely covers 6x9. I've never used it, but I'm sure its got great image quality.
The Super Angulons are great lenses, but they are bulky, and there are small ~90mm lenses that will almost certainly fold up into a VH or similar cameras. I don't know, but I suspect a 3.5 inch or 4 inch Dagor would also work well.