DCUniverseAficionado

I have such respect for you, on an intellectual level, so I am very flattered, right now.  

I'll have to go through my posts on the subject matter (especially the ones that were part of a discussion/debate/conversation between you and I) to refresh my memory. Once that's done, I'll see what I can do.

Here's my most recent thoughts from the "Fit the pieces together" thread on DCTP (posted January 6th, last updated today), that lists the options I've thought of for who certain characters are or are not.

Hyoue
1A. Tsutomu in disguise
1AA. Real/Pre-Coma Hyoue was a person of authority at the NPA—so, now, Tsutomu is Rei's/Toru's boss at the Security Bureau
1AB. Real/Pre-Coma Hyoue was Rum—so, now, Tsutomu is Rum
1B. Rei's/Toru's boss at the Security Bureau
2. Rum... but only if he doesn't remember what Shiho/Sherry looked like

Rumi
1. Asaka (On top of being Amanda's bodyguard, she had a personal connection to Koji (I think that it's more likely that they were lovers rather than family members, though)—she witnessed the double-murder, escaped, and, now, is out for revenge against Rum—she's now testing Shinichi/Conan to see if he can help her)
2. Intelligence Agent
2A. NPA Security Bureau / MPD PSB
2B. Other (FBI, CIA, etc.)
3. BO member
3A. Codenamed member (Rum or not)
3B. Non-codenamed member

Kanenori
1. Codenamed BO member
1A. Not Rum – This, I think, is the reason for Gosho making him a Rum suspect; Gosho wants us to think Kanenori is Rum so people won't see the twist coming, the twist that he is a BO member... but he's not Rum.
1AA. A high-ranked BO member
1AB. Not a high-ranked BO member
1B. Rum – He's more likely to be Rum than, say, Sakurako or Rumi, but I think it's far more likely he'll turn out to be a Rum red herring.
2. Intelligence Agent
2A. NPA Security Bureau / MPD PSB
2B. Other (FBI, CIA, etc.)
3. Connected to plot-relevant character

Uploader
1. Rumi
2. Other
2A. Tsutomu

Tsutomu
1. Alive
1A. Disguised as Hyoue
1B. Disguised as another character
1C. In hiding
1CA. Shrunk due to APTX?
1D. Is Rum (and has had that codename—and has been a BO member—for over 17 years)
2. Dead

Muga
1. BO

1A. Rum
1B. Not Rum
1BA. Not High-Ranked (But still codenamed)
2. Literally just Momiji's butler
3A. Intelligence Agent
3AA. FBI, CIA, etc.

Asaka
1. Rumi
2. Rum
3. Other

Who Rum is not
Rum ≠ Mary
Rum ≠ Sakurako
Rum ≠ Rumi
Rum ≠ Kiyonaga

Rum ≠ Momose

Rum ≠ Ryujiro Uematsu

Unsure
Tsutomu (I just can't be as sure about him not being Rum—as in, him being Rum all along, as far back as 17 years ago—as sure as I am about Rumi, Sakurako or Kiyonaga not being Rum... and, of course, if Real/Pre-Coma Hyoue was Rum, Tsutomu/Post-Coma Hyoue can be Rum, that way, too. Ultimately, my bet's on the latter option, in terms of him being Rum, but I can't yet completely discount the chance that he was Rum all along... but that option is nowhere near my first choice)
Asaka (This is really a question of whether Rum was able to become Amanda's bodyguard, or whether Rum simply came to the room and overpowered the bodyguard—my bet, though, is that Rumi is more likely to turn out to be Asaka than Rum)

Who Rum might just be
Kanenori; Hyoue (whether Tsutomu has replaced him or not) – Least likely
Muga – For me, it's now a 50% chance that he's Rum, and a 50% chance that he's not—it could go either way (you can thank MeitanteixX for this)
Taka'aki; Heizo; Chikara Katsumasa – Most likely (though I must note that, according to Chek's vision tests, so far, Taka'aki is not hiding an artificial eye—therefore, he's gets knocked down a peg, compared to the other two most likely suspects, in my book)

Awaiting your response so we can get a discussion/debate/conversation going!  (and, also, any questions you may have, if you feel this list/post (and/or specific parts of this list/post) requires clarification or explanation—that is, if anything is unclear or vague)