None with the contentious (recent) history with the U.S. that Iran has (don't want to start a debate over whose to blame for that, just stating a fact)
None that have vowed the destruction of one of our allies.
None whose leaders call us "The Great Satan"
The Nuclear Club as it stands now (off the top of my head):
U.S.
Russia
Great Britain
France
Germany
China
Israel
Pakistan
India
N. Korea
Only 2 of those states, Pakistan and N. Korea have joined since '79: N. Korea we helped with that - and are in REAL negotiations to disarm them , and Pakistan is going MAD with India.
Iran, IMO, is a different cat than any of those.