Final Fantasy Games: Main Antagonist vs. Final Boss (possible spoilers)

Please correct me if I'm wrong:

Final Fantasy

Antagonist - Garland
Final Boss - Chaos (Technically also Garland)

Final Fantasy II

Antagonist - Emperor
Final Boss - Emperor

Final Fantasy III

Antagonist - Xande
Final Boss - Cloud of Darkness

Final Fantasy IV

Antagonist - Golbez
Final Boss - Zemus/Zeromus

Final Fantasy V

Antagonist - Exdeath
Final Boss - Exdeath

Final Fantasy VI

Antagonist - Kefka
Final Boss - Kefka

Final Fantasy VII

Antagonist - Sephiroth
Final Boss - Sephirith

Final Fantasy VIII

Antagonist - Egea/Adel ("The Sorceress")
Final Boss - Ultimecia

Final Fantasy IX

Antagonist - Kuja
Final Boss - Necron

Final Fantasy X

Antagonist - Jecht/Sin (you could say Seymour)
Final Boss - Yu Yevon

Final Fantasy XII

Antagonist - Vayne
Final Boss - Vayne

Final Fantasy XIII

Antagonist - Galenth/Barthandelus
Final Boss - Orphan

Final Fantasy XV

Antagonist - Ardyn
Final Boss - Ardyn