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.
Dragon Ball Super: Universe 6 Saga
Dokkan Battle Reroll Tier List
SS3 Bardock event: Super Awakening in the History
PHY LR Characters
INT LR Characters
Path to Victory Super Gogeta
Beautiful Rose-Colored Terror