Golden Age Dr. Fate
The only difference between the Golden Age and Silver Age Dr. Fate is his truncated helmet.  I built the Golden Age Dr. Fate  by taking a Dr. Fate base figure and grinding away the bottom of his helmet.  I then cut the mouth and chin area off of a Green Lantern figure.  I then melded the two together using Sculpey.  This is harder than it sounds.  It took quite a bit of trial and error to get it to look right.  I also used Sculpey to cover the original eyes on the helmet.  I then painted on eyes to match the look of the Golden Age Fate's helmet.