Here's another great cover. It's called "The Chninkel" and is considered as one of the best European comics of the twentieth century. Definitely top ten material of the best comics / stories ever !
It's not very known in the US, and that's a shame... it can hold his own against the likes of "The Dark Knight Returns" or "Watchmen".
http://www.forbiddenplanet.co.uk/images/G/G2901.jpg
I always loved this cover