Vocal range is not the spectrum of the lowest note you can hit to the highest, it's the lowest note you can hit comfortably and maintaining a certain quality to the highest.
While that's true from a music theory/vocal instruction point of view, the OP's question is what is his "vocal range across all studio albums" -- i.e., what are the lowest and highest notes he has hit on all DT studio albums (and, I suppose, also the solo stuff he's done and maybe even including Winter Rose material).
With that said, not sure what James' real range is. The F#7 is definitely is highest note but there is no way it's in his actual range.
The F# in Learning to Live is F#5, not F#7.
If you believe the unsourced comments in the Wikipedia article for the song "Octavarium" (
https://en.wikipedia.org/wiki/Octavarium_(song)#:~:text=By%20the%20time%20the%20song,A%20Dramatic%20Turn%20of%20Events). ), JLB hits G5 on the fourth repetition of "Trapped inside this Octavarium" at the end of the "Intervals" section of the song.
This video (
https://www.youtube.com/watch?v=1oSh2ZdIOaY#:~:text=Watch%20QueueQueue-,The%20Vocal%20Range%20of%20James%20LaBrie%3A%20E%E2%99%AD2,B%E2%99%AD5(%2DB5) ), which mostly includes live stuff on the high end of the scale, contends his range is Eb2 to Bb5.
The Wikipedia article mentioned above also says he exceeded G5 on BMUBMD, and I found a source (of questionable credibility, so I'm not linking it) that says the note is an A5. I have no idea what part of the song this supposedly happens in or whether that's right.