Before we transition fully to Moore a few more items to the originators of Swamp Thing.
From Paul Levitz’s 75 Years of DC Comics:
Bernie Wrightson: :Wrightson only took on one series --Swamp Thing – during a five year run at DC. 'Gimme a good story that’s just a few pages long and I can really pour on the steam and do a real bang-up job." Wrightson declined an offer from DC to revive the Shadow in 1973.