Roles of characters in King Lear

I'm not sure what type of "roles" you are referring to. Lear is an old king, he originally divides the kingdom among his three daughters but ends up refusing it to Cordelia as she will not flatter him like her sisters. He banishes her, though regretting this action once living with Regan and Goneril who are ungrateful and treat him horribly. He escapes to the woods and encounters poor Tom, a madman, with whom he sympathizes. He wishes to reduce himself to essential man. He then goes mad. Kent and Gloucester help him to Dover where he is reunited with Cordelia. They lead the battle with France against Albany and Edmund, but lose and Cordelia and Lear are taken prisoner. After Cordelia's death, Lear grieves and dies.