I have been using Royal Brights paper with good results as you can see. Also tried Epson photo paper, but it seems to have a waterproof vellum on the back that sticks to my iron. In order to use it, after printing I split it apart at a corner and peel it off before ironing. Works really well that way since it is then only half thickness, allowing heat transfer very quickly of the toner. It comes off easily with a 5 minute soak in warm water. Hope that method works for you.

John