This includes customizers, hot rodders, and even just automotive/motorcycle designers, past and present. Please post up some fine examples of their work.
NOTE: if this turns into a bash-the-builder-fest (yes even Jesse James) I'll delete the post.
I'll start off with Sam Barris, brother of George, 1924–1967. He started Barris Kustoms with his brother and is responsible for some of the most amazing and subtle custom cars ever made.
The Hirohata Merc, arguably one of the most influential customs of all time.
This beautiful '50 Buick.
The Blue Danube '52 Buick.
And Sams personal '49 Merc.
Post up your favorites works!