I don't need to meet him - his contemporaries speak enough about his manner, and way of doing business for me to feel okay making the pronouncement - bear in mind, many of my closest friends are an asshole much the way, edison, gates and jobs are/were - being an asshole does not make you a bad person - it just means you may have little patience for convention.
Keep in mind that Edison was constantly being sued by his rivals (Edison nearly always won). Any successful businessman is going to have legions of detractors.