Clarification - I don't think any of the council are regarded as Jedi any more - (considering what Kreia says if you meet up with the LS at Dantooine - and their actions - (Kavar did little to stop the Civil War, Zez didn't do anything in the refugee sector and Vrook was being his usual charming self). Atris has already fallen - and many think she died, so she cannot be considered a Jedi. All the others were in hiding - so the Exile was the last Jedi, in terms of being known. I don't consider it a plot hole as such, myself
