Here's a simple piece of classic design, the Frankfurter chair, available from Thorsten van Elten.
Although not attributed to a designer, the shape of the chair is instantly recognisable and has been in production for over sixty years. Made from natural beech, it's a nicely neutral design that will fit in well to many different rooms.
The best bit is that it's currently reduced in price too, selling for £75.
See them online