Your chart is probably a good bet for jets, but turbo-props can be tricky.

For instance, the final row of the Dash 8-200.

According to Seatguru, on Horizon's version (which are rapidly disappearing), the final row is ABCDE, in which "C" is technically not an aisle seat in the classic sense of the word. (Though it is an aisle seat in the sense that you are basically sitting in the aisle..but you are potentially cramped between two other people, which is not really what you would expect in an "aisle" seat)

Likewise, on US Airways, the final row of the Dash 8-200 is ACDEF in which "C" again is not an aisle seat (since the "aisle" is actually seat "D").

Likewise, the EMB-120 flown by Skywest as United Express has an A-BC seating pattern, in which B is the aisle and C is the window.