Here is a very, very nice on-ear wood-earcup headphone from Thinksound. I previously reviewed their On1 headphone and Rain2 IEM. This time around, the On2 has a much better non-glossy wood finish, and I suspect better drivers, since the clarity is phenomenal. It isn't the easiest thing to have mellow sound with great clarity, so there ya go.
http://www.mymac.com/2016/10/on2-headphones-review/
http://www.mymac.com/2016/10/on2-headphones-review/
