I think Kirkland can be excluded from the list.

Episode 7's press release:

"With the final clue in hand, Jane attempts to gather the remaining Red
John suspects in one place in hopes of finally revealing his identity
Read more: Listings - MENTALIST, THE on CBS | TheFutonCritic.com "

So Jane is gathering all Red John suspects, and Kirkland isn't going to appear in this episode according to FutonCritic.com. Kinda tells me he'll get 'eliminated' in the upcoming episode.