I was thinking about the "magic giant" archetype in OD&D, represented by the djinn and efreet in Monsters & Treasure. But it also, theoretically, includes Titans. Something just occurred to me, though. Titans have psionics. This may just be because Titans were added in Eldritch Wizardry at the same time as psionics. But it may also have something to do with Star Trek. Specifically "Who Mourns for Adonis?" and, to a lesser extent, "Plato's Stepchildren". Apollo, in the former, is the Apollo, but has no magical powers, only mental powers amplified by alien technology. The colonists in the latter aren't the source of Greek myths, but certainly believe that they are gods because of the psionic abilities they've developed.
This of course opens up a different tactic for roleplaying the Titans.