I know they have chairs that are made from stairs but i find those a little too compact and unattractive in the fact that they can only be uncomfortable wool and cobble. if its possible to sit on half blocks, you could implement wool and use stone hb (half blocks) or sandstone hb which look a little more comfortable. plus theres more room to sit. i personally have black wool and stone hb in my house. Obsidian half blocks would also be useful. Any one want to try to make one of the 2?