You forgot one, the Paid Troll! These are the worst by far because they are literally earning their living to push political agendas (HASBARA comes to mind).
It's great on Steemit that we are able to see the kinds of comments that everyone makes, so it's so easy to just go and look to see if the person is an actual paid troll, not that I've found one here yet, but I can see their comments and know if they are just copy/pasting the same comment onto everyone's posts about the issue they are fighting.
Great post BTW! I've never had to flag anyone here yet since September, goes to show the kindness and consideration of the Steemians I have met so far. xo