can anyone tell me if I can cover an angel food cake with fondant or is it too heavy for this sort of cake? What is the best for this kind of cake...
Angel food cake has a very light and springy texture. It has no fat and so can sometimes feel more dry than other types of cake.
It is eaten precisely because it has a lighter, less rich, flavor. Toppings should accentuate this not detract. It's rare to see a rich buttercream frosting on an angel food cake, for example. Common toppings are whipped cream and fruit, a simple glaze, or just a dusting of powdered sugar.
Once cooled, an angel food cake would be able to support the weight of thinly rolled fondant but it is my opinion that it would not at all work with the simplicity of that cake. If you are going to eat the cake then you should use a lighter topping. If you aren't going to eat it then put your fondant on a cake that is less work to make.
Much of this information was written years ago in comments by Jolenealaska, Catija, and dlb.