I am filming business people in bright daylight. it makes sense that they would wear a white business shirt and a dark grey jacket.

Any advice for dealing with exposure issues? any special camera settings to compensate for light metering on the person's clothing?
here is an example: https://www.shutterstock.com/image-photo/happy-cute-person-1034063050?src=3NJblOZvOora7fKSkD1WEg-3-11

or should I just do editing in post? I prefer to shoot everything right and reduce computer work.
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I have the same problem with old actors who have white hair. the photos sometimes come out blurry or they just look weird.
here is a sample: https://www.shutterstock.com/image-photo/confused-retired-male-1011382726

any tricks to making the white hair look less goofy? should I film him with white shirts, or on a white background?

you said: "Ever heard of scrims or diffusers or perhaps open shade???"

I have reviewed where people demonstrate these techniques on youtube, and I am not happy with the resulting quality of the skin color or shading on the model. I am looking for a solution whereby I can get the best photo with natural lighting.

There is no �fixing it�.  The light that comes off the subject is recorded by the sensor.  Either you modify the light or you fix it in post.

Metering is irrelevant.  If you expose it darker, everything is darker.  If you expose it lighter, everything is lighter.  There�s no affecting the light area without affecting everything else.