I'm thinking Fred Whitfield completes the set. It's a tough one because it's faded badly but I checked his autograph on the net and it is pretty close. I wouldn't bet the farm on it but I believe that's who it is. Here's a photo of that last autograph. I cropped the image down to just this single autograph so I could post it with my phone.
Here's an image that I doctored using brightness and contrast and color saturation tools. It hasn't been altered to make it look different. It just brings out what is there better.
This one was tough because it was apparently done with a pencil and it has faded badly. This is the last one too BTW.