Perhaps I am not being quite accurate in calling it a "viewfinder". I
accept
that the higher end cameras have a proper optical viewfinder operating on
the SLR mirror / prism system, but the LCD panel also serves as a
supplementary viewfinder, as well as a display medium for photos already
taken.

Several DSLRs have live LCD viewing, which could be considered a viewfinder,
as it serves the same function. I recently purchased such a camera (though
not for that reason). I haven't checked skin tones, but the color rendition
is not obviously "off".

Perhaps I'll drag out my Macbeth color checker and compare under noon
daylight -- the next time we have any in Seattle.

One of the best uses for the LCD panel is to confirm the camera's
color-temperature setting. It's particularly useful when fine-tuning the
green-magenta axis under fluorescent light.

As I write this, I'm watching CNN on my cheap-but-good 32" Vizio. Most are
perhaps slightly "warmer" than they should be. Not having the original flesh
for comparison, I can't know for sure.