Warrior

 A black and white illustration by Frank Bellamy. Not sure of the year... I assume it's from the early 70s?

Check out this cool Frank Bellamy website. And also visit Alan Davis' website where you'll find a haul of FB's work.

Big K

Ron Embleton paints the cover for issue one of Big K magazine April, 1984.

 

Superflop

 I'm fairly sure that this is Brian Lewis. From the pages of Look-In, dated 23rd September 1972.