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 LR Characters
Dokkan Battle Reroll Tier List
How to get/farm Supreme kai medal
Extremet Z Battle: Broly
HERO Extermination Plan Evil Powers Strike Back
The Shadow Dragons of Despair
Impulse of Anger Great Saiyaman (SS2)