Dragonborn Magic-blooded Lesser aasimar Paladin (Harmonious Knight) 4/Crusader 1/Ruby knight vindicator 2/Mythic exemplar (Reikhardt) 9/
Marshal 1/Ruby knight vindicator +3
Feats: 1: Dragonfire Inspiration, 3: Snowflake Wardance, 6: Extra Smiting, 9: Martial Stance (assassin's stance), 12: Shadow Blade, 15: Devoted Inquisitor, 18: Song of the Heart
Bonus Feats: Flaw: Two-Weapon Fighting, Flaw: Dreadful Wrath, Marshal: Skill Focus (Diplomacy)
Auras: Master of tactics (minor)
Spells (paladin): Grave strike, Knight's move, Vision of glory
Equipment: Badge of valor, Cloak of charisma +6, Gauntlets of heartfelt blows & gloves of the balanced hand, +X Feycraft short sword x2, Vest of legends
Your race's base ability modifiers are +4 Cha, +2 Con, -2 Dex (a Magic-blooded Dragonwrought jungle kobold would be even better, but you have to burn a feat for that; I'd throw on unseelie fey but it seems kind of silly). Add +5 Cha from level up bonuses, +5 from wishes/tomes, +6 from a cloak. You can gain a further +4 bonus for 9 rounds as a swift action. Your total Cha modifier at lv20 = +14 (+16). You gain this as a bonus on saves, as bonus fire damage with melee attacks, as a bonus on attack rolls with slashing melee weapons wielded in one hand, and as a damage bonus for you and your allies while flanking. The Will DCs for Devoted Inquisitor, Dreadful Wrath and
dominate person are 34 (36), not including the -2 save penalty if Dreadful Wrath renders them shaken.
You have +17 BAB, IL 17 and cast spells as a 12th-level paladin (meaning 3rd-level spells), Dragonfire Inspiration +5d6 fire, and Inspire Greatness as a 14th-level bard.
By taking Ruby Knight Vindicator before Mythic Exemplar, you can add Hide to the latter's class skills.