I'm a big fan of this poem, but I feel it's acutely anti-Epicurean. "Raging against the dying of the light" brings to mind a bitter and agonising response to dying.
I agree that it's not Epicurean. However, I have always read "rage, rage against the dying of the light" as defiance (perhaps even a kind of "heroic" defiance), rather than bitterness. Remember, it is Dylan speaking to his father, not his father speaking ...