When photographing still life with multiple light sources, reflectors and flags, I find that I if I happen to be using the camera’s on board spot metering, it rarely provides the correct exposure to bring out the colours that I consider to be true.
I find, in general, the in-camera auto WB brings about the same results as a grey card and minor adjustments are corrected in LR, so I leave it as that.
What does make a difference for me with still life photography, is using an incident light meter.
Once I have set up the shot with the various lights, reflectors and flags, I take a reading off each light source and adjust each light according to its meter readings, set them in their groups and off I go.
This set up provides the best results for me and are as close to the original colour as I can possibly expect.
Other than that, complications occur when it is time to display my work as every monitor, printer, tablet may have a slightly different colour tint to it.
When uploading to stock agencies, I take into account that people paying and downloading these images, are generally professionals, with high end wide gamut monitors that have been properly calibrated to Adobe RGB. Profoto has a wider gamut, but I am not sure if is possible to have a monitor that can “yet” display such a wide spectrum of colours.
This is why, when I upload to some well known stock agencies, they tend to use sRGB for the smaller sizes(Used for Web) and Adobe RGB for medium to larger sizes(used for print).
if you happen to be working in Profoto, you need to ensure that the colour does not alter when exporting to sRGB or Adobe RGB,.
As Nir correctly mentions in his answer, correctly calibrated peripherals (Monitor and Printer) are essential if you want your work to be as true to the original specially if your targeted audience is going to be professional advertising/publishing agencies looking for good quality content.
Finally, I also take into account; what I perceive to be a certain color, ,may not be exactly how someone else sees it, thus making a good argument for having a standard that the Color checker provides.