There was really a fighter named Mighty Konadu! Sounds more like a pro wrassler name doesn't it. Lora, you have to know your stuff to have this boxer on your list!
Summary : almost everyone. better question : who were the great pressure fighters who did not have a very good jab.
Miguel Cotto came to my mind first. Joe Frazier's jab tends to get underrated, it was great for setting up his hooks. Gerald McClellan had a very good jab when he used it.