Best Candidate for Summoner Support?

I’m currently in a relationship with my neutral Sigurd but I’ve been noticing other potential candidates for the bonuses that the Summoner Support provides!

Please give insight if you as much as possible!

1. Sigurd (Neutral)
W: Divine Tyrfing
A: Swap
S: Bonfire
A: Close Defense 3
B: Crusader’s Ward
C: Speed Smoke 3 (probably changing this to Goad Cavalry)
SS: Distant Defense 3

2. Eldigan +1, (-HP, +SPD)
W: Mystletainn
A: Swap
S: Bonfire
A: Fury 3
B: Swordbreaker 3 (considering Desperation 3 to go with Brash Assault 3)
C: Goad Cavalry
SS: HP+5 (Brash Assault 3)

3. Black Knight +1
W: Alondite
A: Swap
S: Black Luna
A: (Steady Breath once I roll B!Ike)
B: (Wrath 3 once I roll B!Ike)
C: Fortify Armor
SS: Speed +3

Just between these 3! Thanks!