I FMQ on a slightly newer Kenmore, a 1956 model. It has a high shank foot. I use a darning foot. There is no name on the particular foot I use but it looks just like this Elna foot in the following Etsy link. It works great for me. I tried a hopping foot but did not have as much success with it.
Note - the foot pictured is low shank. I don't know what shank your machine is. I could not quickly find a picture of a high shank model.
https://www.etsy.com/listing/8778342...n-foot-vintage