One non-dragon commander that may like the Hellkite is Child of Alara, a WUBRG deck that may wipe the entire board to start things over, then reanimate threats like Two-Headed Hellkite to resume the offensive thanks to haste
Usually it's gain arbitrarily large amounts of life and never die and nobody cares because you still lose to Thassa's Oracle, but this is a fun way to gain some life and get something out of it and build a deck around that
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With that in mind, much as we might be excited for Purphoros, God of the ForgePurphoros, God of the Forge or Bow of NyleaBow of Nylea, the card that should actually make your 99