I have wrote down everything he has dropped for me in the last 4 months. He has dropped evey legendary shield and a deadly bloom. Every legendary grenade mod. All characters legendary mods. All smgs but the Slagga. All legendary assault rifles and shotguns except sledges and flaker. Legendary pistols all except thunderball fists, Maggie, and infinity. Rocket launchers have not seen norfleet,bunny, or Mongol yet. And snipers have not seen invader, longbow or volcano. As for e-techs 2 snipers 3 pistols, and 1 plasma caster. The legendary he drops for me the most is the cradle shield 7 times and the quasar grenade mod 6. I do know some that I have not gotten, others have. It is just a matter of luck on what he decides to drop.
Just got a Cowboy HammerBuster. Have gotten a legendary class mod (gunzerker), KerBlaster , I'm sure there's more just can't think right now. The one for me is Hunter Hellquist he dropped 4 bees in like 6 runs. (Pre patch)