David Hockney

This "BOOSTER" as Dave would put
it is actually one of the most influential artists of the twentienth century, having had a big part in British pop art movement in the 60's.
Whilst Hockney is well known for his paintings it is his lens based work that i find most appealing . A technique Hockney was very fond of was joiners, where as the name suggests you join a number of photos together to create one image.
In my opinion his best work was his composite polaroids shown below.