I was advised that I had been remiss in not mentioning Bob Haney. Writer Bob Haney co-created Metamorpho, along with Eclipso, and an obscure super hero team called the "Teen Titans" or something.
Haney wrote mostly for DC and worked in nearly every genre. He is often remembered for the oft-reprinted "A Dirty Job" from Our Army At War #241. Mr. Haney passed away in 2004 after retiring to Mexico.
And now, Metamorpho!