I don't know of any consumer (home use) non non-stick waffle irons. The commercial ones are bare.
I use a Sunbeam W-2 that was originally purchased by my mother in 1954. It is very heavy, heats evenly and bakes beautiful waffles.
Like this: http://cgi.ebay.com/SUNBEAM-ELECTRIC-WA ... 4cf5786e0a
The C-G model was essentially the same, only the shell is different: From the late 1960shttp://cgi.ebay.com/Very-Nice-Vintage-S ... 3cb70eefa9
I also have an Arvin from the same era, that is the same size, also very heavy, made like a "Mack truck" and which I use when I have company and need lots of waffles. Like this one: http://cgi.ebay.com/VINTAGE-ARVIN-MODEL ... 2eb485ef14
Every few years I clean the grids with oven cleaner and then re-season it (wasting several waffles in the process) but the results are worth it.
GE, Dominion, Toastmaster and Westinghouse also made waffle irons that are excellent.
Vintage ones that are not so good are Bersted, Kwikway, Magic Maid, Munsey, Electroway.
I used to have my vintage appliances repaired by Speedy Appliance Service in Woodland Hills, on Ventura Blvd.
I don't know if they are still in business but they used to do a lot of very fine work for me.