Yea that wasn't Koth, so he could still be roaming the galaxy. That don't make sense for there to be no more Inquisitors. Didn't Kanan ask one of them how many there was and the Inquisitor said there was more than enough or something like that.
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The price of fame is high and the Thing cant pay the way.
Not sure if Kirak can be considered a true Jedi, aniway apparently Jocasta Nu survived too. Also there is a mobile game where you are an inquisitor and you hunt down 4 Jedi. Is that considered canon?
Bariss definitely survived and she will probably be the surprise Jedi who survived in the new Darth Vader comics. Vader and her fight for control as Palpatine's apprentice and head of the Inquisitorious program
Also, Quinlan Vos surviving would be awesome. They could do a novel about it that takes place around 15 BBY.
Jocasta Nu is the surprise Jedi that's appearing in the Vader comics coming up. Although Bariss is probably alive at this time and possibly even during the time of Rebels.
Eeth Koth could still be alive as well.
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The price of fame is high and the Thing cant pay the way.