best couple?
hmm... Scarlet and Heidegger and palmer and rufus and president shinra and reeve.
Ruby and emerald
good chocobo and great chocobo
blue and green chocobo
black and wonderful chocobo
and of course
tifa and cloud
aeris and zack
cid and shera
barret and late wife
vincent and lucretia (who knows... throw hojo in there if you like)
prof. gast and ilfana
elmyra and late husband
zacks parents
late dyne and late wife (dont remember name)
(SPOILER)Marlene and Denzel: Advent Children
nanaki/red xiii and a female member of same species?
Tifa and rude
reno and aeris
mukki and cloud
dio and cloud?
yuffie and materia
late Seto and late wife
hojo and a bunch of bikini girls
johnny and someone
etc...etc....