The Monte Rosa chain, on the border with Switzerland, takes in a good number of peaks of over 4000 m. The best known of these are the Breithorn (4165 m), Polluce (4092 m), Castore (4228 m), Lyskamm East (4527 m) and West (4480 m) and the Pyramide Vincent (4215 m).
Proposals:
Monte Rosa Tour
Crossing of Monte Rosa