I am disappoint at Legendary Deathclaw? Better enemies? Fallout New Vegas?

They was no challenge in the Legendary Deathclaw. I saw him, and blasted him with a roket launcher while boone sniped. I've face the Legate, L. Nightslaker, L. Cazador, L. Deathclaw, and I want to know if there is anyone in this game stronger then them?