Laurent
Morgan
Kjelle
Owain (without Missiletainn)
Cynthia
Owain (with Missiletainn)
Severa
Nah
Gerome
Brady (if you don't care about villagers)
Inigo
Yarne (against Green or Red)
Noire
Brady (if you want to save all villagers...so many bows )
Yarne (against Green And Red)
Edit : I did all of them with the same team between chapter 15 and 16 (Normal mode) : Say'ri(Swordmaster)&Avatar(Grandmaster), Chrom(Greatlord)&Sumia(Pegasus not Falcon), Lon'qu(Swordmaster)&Olivia(Dancer), Henry(Sorcerer)&Maribelle(Troubadour) for those who were fighting (my promoted units were lvl 1-7) + Liz&Gaius (for Rescue Staff and Physic) + the parents of the child.