There's been plenty of tributes flying around the comics blogosphere for Dave Cockrum since his untimely death. The lads and lasses at the often annoying, always entertaining Scans Daily have been particularly on the ball about this, especially this 'un: Cockrum's lesser spotted Doctor Who illustrations from Marvel USA's reprints of the Pat Mills/John Wagner/Dave Gibbons stuff from their UK branch.
Cockrum was always essentially a science fiction artist, his best work was his short stint on the Legion in the early seventies, and his first run on the X-Men usually involved them finding themselves off-planet for one reason or another (battling Sentinels on space stations; Professor X getting it on with aliens; Cyclops meeting his space pirate daddy and his Star Jammers; fighting the Legion-analogue Imperial Guard).
This lovingly rendered Davros and The Daleks piece again shows his obvious enthusiasm for the genre.