Ecstatic, overjoyed.
Healthappy (healthy and happy)
abundant
surplus overabundance surfeit
yummy
Passion is the only word I can think of right off hand.
More happy. To express happiness that is more than merely 'happy', but not as much as being 'happiest'.
greatful is another word for happy
The prefix "un-" could be added to the word happy to create the word "unhappy," which means not happy.
Majority means greater than half. Greater means more than.
Being unable to be happy means being Miserable
Try the word Cherish
Healthappy (healthy and happy)
majority
Yearn
abundant
endlessness
Less or more