Let me put it this way: all modern Rollies have flaws. I mean, A LOT.
Now, imagine a TT Sub.
As By-Tor said: "but the two-tone Oyster bracelet doesn't cut it. The color and quality feel simply isn't there."
So, besides CGs, Insert, Low crown, etched crown, dial, poor lume, squeaky bracelet, you will have the gold issue too!
I think that gold is a huge pain in the ass. You can't fix it!!!
So, back to your question: "Can anyone tell me who has the best, most realistic looking TT Blue sub?"
As I said before, Rolex has it!
Otherwise look for MBW or WM9 (too expensive). You can find some review about them.
But, as I said before, modern rollies have fundamental flaws.
If you like modern Rollies go for a noobmariner with gen insert and crown (and tube).
That would be "realistic"!