Something to note before we begin:

The storyteller (Aka Bruno Heller) has
explained in no uncertain terms that the list is real. It would be
dishonest and stupid to lie about something like that. Had he not wanted
the list to be real he wouldn't have given a straight answer to media. Lying is bad
storytelling. This means one of the 7 suspects is for sure RJ. Anyone
outside of the 7 on the list, including but not limited to someone's twin(Sorry Kirkland
camp) is off the table.

For the rest who believe your suspect could
still
be Red John:

Someone as careful and calculating as RJ could have
planned/planted DNA or faked evidence if tyger tyger is really as deep
as they make it sound. Confirmation of the deaths from the blast is
brought to light and accepted as fact during the show before mistrust in other law enforcement is placed. Forensics and all 'facts'
that are not in front of us are up for debate. I do, however think that
Partidge is dead. It makes no sense that CBI agent Cho would somehow not
recognize a former colleague or look at his face to be absolutely
certain it's him. Especially when there is so much mistrust going
around. I give the writers more credit than that. That being said, the
"DNA evidence" is not anything concrete that we can trust. This leaves
Mcallister, Haffner and Stiles all available to possibly be alive. It is
a fair guess assume that Patrick Jane isn't convinced that RJ is
Bertram. Bertram is an evil man so PJ doesn't care about the pressures
or situation Bertram is in now with the finger pointed at him, but he
isn't RJ. Patrick wants RJ all to himself. That being said, I have no
idea who RJ is but my hat is off to the creator for making such an
interesting finale and finally bringing this wonderful mystery to a
satisfying close. Keeping us guessing right until the very end.

In Closing:

I
apologize in advance this is a bit of a double post on one I had
created earlier but my previous one wasn't as complete as this. I
look forward to your votes and challenge you to find flaw with and/or
come up with counter-arguments to what I've said. Please comment and
tell me what you think!
***POSSIBLE SPOILER BELOW***






On a side note:

We
don't understand the context of the blurry pictures of Mcallister in
the promo for the finale. That being said, there's no way to
definitively say that he is or is not Red John. It may be fair to guess
Mcallister is still alive, thus providing further evidence that some of
what I said above may be true.