I know a lot of folks favor Carmine Infantino's work on Batman or Flash or what have you but, in my opinion anyway, the best work of his career was in the back-up stories in the Flash staring Elongated Man. Especially when he managed to ink them himself. Man, I just love that stuff! I was going to go into all the reasons this stuff holds up so well to this day, but I think you just have to see if for yourself. Go pick up the Showcase Elongated Man, I can't recommend it enough.