Of special note is is influential run on Hellblazer, hand picked by Alan Moore to write the spin off he more or less created the character of John Constantine we have today, the best anti-hero in comics.
His run on Animal Man, while less well known than Grant Morrison's third wall breaking run, is superior I think. He takes the character to a series of deaths, rebirths, into a new human form and the character even founds a new religion and threatens to have the animals overrun America. And Animal Man becomes one of only two characters I'm aware of that gives birth to himself (the other being Swamp Thing.)
Rawbone, a blood thirsty pirate comic is a recent gem, as is the original graphic novel Hellblazer: Pandemonium. Delano's series Outlaw Nation features a wide cast of characters, part of a long lived family struggling against their centuries old patriarch who rules the country from the shadows. The protagonist is a Vietnam Vet whose main talent in life is the ability to write schlocky Westerns that have a profound influence on reality.
Jamie Delano: under-rated as fuck.