I have:
Imperil Earth:
Guy (II) - Gaia Drum (Ogrekiller)
Poison:
Edgar (VI) - Chainsaw (Chainsaw)
Holy:
Agrias (FFT) - Divine Ruination (Excalibur)
Beatrix (IX) - Knight Protector (Lightbringer)
Cid Raines (XIII) - Seraphic Ray (Raine's Gloves)
Fire:
Locke (VI) - Mirage Phoenix (Thief's Knife)
Galuf (V) - Sweet Sorrow (Sledgehammer)
Steiner (IX) - Sword Magic Firaga (Tin Armor)
Lightning:
Lightning (XIII) - Focused Bolts (Enkindler)
Cid (IV) - Jump Start (Thor's Hammer)
Dark:
Nabaat (XIII) - Sacrifice Pawn (Folding Epee)
Seymour (X) - Anima's Pain (Seymour's Rod)
Water:
Kimahri (X) - Aqua Breath (Halberd)
Or, sorted by realm:
FFI - Nothing
FFII - Earth
FFIII - Nothing
FFIV - Lightning
FFV - Fire
FFVI - Poison, Fire
FFVII - Nothing
FFVIII - Nothing
FFIX - Fire, Holy
FFX - Dark, Water
FFXI - Nothing
FFXII - Nothing
FFXIII - Dark, Lightning, Holy
FFXIV - Nothing
FFT - Holy
So I guess I'm missing Imperil Ice and Wind.