I deeply sympathize haha...I probably spent the better part of 2 years trying to fix what I thought was a channel imbalance and then realized it was my own hearing. I even returned tubes that I thought had a channel imbalance (sorry TubeStore)! I was hearing voices coming from the center left most of the time, so the opposite of you.
So I did a little hearing test at a Costco and found that I do actually have a significant discrepancy between my left and right ears, my left ear being a lot more sensitive in the upper mids and in the bass frequencies than my right. The result was that female vocals were usually centered, but more bass-heavy male vocals drifted left. When I would try to correct it with channel balancing methods, it would shift everything right, but then the instruments followed as well. And the stage sounded askew, even though the voices were centered.
The ultimate fix was actually investing in gear that portrayed the sense of forward depth very well. So using the Pendant SE and Auteur Classics, I now very rarely hear the voices off center. My 6XX's, with a more shallow depth, tended to throw voices left, as did my Aeolus. Both of those headphones like the cram stuff in your face, so the difference between "center" "left" and "right" are all very close together, rather than existing outside and in front of you in space. But with more neutrally presenting headphones and a good sense of forward depth with good imaging (the HESE V2 and HE 1000V2 did this too) voices were in their "right places" again.
So I imagine the fix is very often personal, depending on which frequencies are out of balance the most. But I would give this forward depth thing a try, if it's a possibility. Then yes, of course there are some recordings with the voices just naturally towards the left or right. They're not always centered. Mark Knopfler's "Shangri-La" recording still presents with a left-of-center vocal presentation, on all tracks. Whereas "Golden Heart" is centered on all tracks.
I hope this helps!