Bio: This isn't really a specific person, but a title. Drygur is a Kryptonian term meaning "leader". A moliom was a member of the Kryptonian Science Council, the ruling legislative body of the technocracy that was the pre-Crisis Earth-1 Krypton. Thus, a "Drygur Moliom" was the president (or speaker) of the KSC.
In many versions of the Superman origin tale — especially as seen in flashback in the 1960s-1980s — the person shown denying Jor-El's claim in Council that Krypton was doomed may be assumed to be the current Drygur Moliom.