The following character can become LR by Dokkan Awakening. Summon rates for them are however very low, and we don't recommend you to aim to get them.
AGL UR Characters
Ferocious Counterattack Android 18
Dokkan Battle Reroll Tier List
Ultimate Awakened Power
Passion Beyond Pride Super Saiyan 2 Vegeta
Crimson Flare Super Saiyan 4 Vegeta
Eternal Horror Legendary Super Saiyan Broly