Who is Fire Emblem Birthright's Best Unit?

It's got to be one of these three, but which one is still up for debate.

Bluegh's Channel:    / @bluegh  
Scepti's Channel:    / @scepti  

Song List:
Sonic R - Living in the City (Instrumental)
Neon White - Virtual Paradise
Street Fighter 6 - Sharpened Sonic (Guile's Theme)
Sonic Frontiers - Floating in the Blue
Sonic and the Fallen Star - Amy, It's Cold Outside
Neon White - Glass Ocean
No Straight Roads - vs. DJ Subatomic Supernova (Christmas Version)
Pac-Man Championship Edition 2 - Pac Step
Maiden & Spell - 地下都の水道塔 ～ The Buried Capital Aqueduct
Persona 1 - Elly's Theme
Sonic Frontiers - Go Slap
Pokémon Battle Revolution - Gateway Colosseum
VA-11 Hall-A - Welcome to VA-11 Hall-A
13 Sentinels: Aegis Rim - In the Doldrums
Sonic Colors - Planet Wisp (Act 2)
Sora no Kiseki the 3rd - Determination of Fight
Celeste - Forsaken City (Sever the Skyline Mix)
Nintendo eShop - April 2014
Penny's Big Breakaway - Tutto Finisce a Tarallucci e Vino (Pengo Mix)
Splatoon 3 - Anarchy Poisons (Bird Mix - Shiver)
Sora no Kiseki FC - Sophisticated Fight
Trauma Team - Forensics ~ Dying Messages
Mario Party 3 - Deep Bloober Sea
Nintendo eShop - July 2014
Princess Peach: Showtime! - Time for Tea? (Patissiere Peach)
Super Smash Bros. Brawl - Underground Theme (Super Mario Bros.)
Melty Blood: Type Lumina - Magician's Night EX

Timestamps:
0:00 - Intro and Choices
1:25 - What We Value
6:19 - Restrictions
8:14 - Ryoma Overview
14:11 - Ryoma's Skills
18:57 - Other Classes for Ryoma
21:11 - Ryoma's Flaws
25:49 - Corrin Overview
31:00 - Nohrian Classes
44:49 - Hoshidan Classes
1:01:15 - Corrin's Flaws
1:08:10 - Corrin's Gender
1:15:38 - Azura Overview
1:26:14 - Azura's Flaws
1:32:43 - Closing Thoughts