i'd go with leafeon.
it has strong attack and defense stats
it has a diverse movepool (which includes the rare leaf blade that it also gets STAB from)
it has the abilities leaf guard and chlorophyll, so when teamed up with a flareon who also gets bonuses from sunny weather, you have one strong leafeon, despite its weakness to fire types.
but thats just my opinion. if you're an ice type fan, than who am I to get in your way?