I have a walking foot for my FW and use it when I quilt. Many people have said that quilting on the FW is not good because it strains the motor but I haven't had an issue. I don't quilt a huge top on it and I only work in short sessions. I quilted a baby quilt but the FW is pretty small space for a large quilt.
I also have the 1/4 inch foot and use that as well. I have a 50s FW that has the 1/4 inch marking on the throat plate so the foot isn't really an issue. My older FWs don't have the markings on the throat plate so I have to have the 1/4 inch foot or wouldn't know where I was sewing.
I got a darning foot with one of my FWs and I am able to FMQ with that one. You know, there really isn't a need for any other machine when you have a zig-zag attachment and the other feet...... I love my FWs.