Granted you'll need to be a fan of the band to full appreciate these, but if you are, The Beatles wall murals at Photowall are pretty spectacular.
The collection features a mix of classic album covers and group shots, all available as made-to-measure wall murals – so if you want something to fit a wall, that's exactly what you can get. All you have to do then is get it attached to the wall – but you might want to get a professional decorator to do that, especially if you are going for something big and potentially pricey.
Talking of price, that's £31 per square metre, so definitely affordable for a feature wall, with delivery in around 4-6 working days.