What about Wolf, or Bluestar or CC as other options if price isn't really an option, have you checked out any of those?

Topic says rangetop but post says range.

Rangetop you should look at Capital Culinarian and Bluestar RNB.

Range Capital Culinarian self-clean model or Bluestar Platinum Series.

These are open burner ranges and rangetops like the ones used in restaurants. Powerful and very even heat. Lots of threads on these two brands in this forum and several videos on youtube so you can see how they cook and clean.

Are you looking for a built-in grill or just a grill insert? A grill insert is not much different that just buying a cast iron grill/griddle and placing it on top of two burners. It is just a custom fit. Built-in grills offerings can differ significantly and you will need a more powerful rangehood to accommodate them.

All appliances will have some negative reviews.

None of the premium range companies make their own electronics. They all buy from the same suppliers. They can all have problems that is why they have warranty departments. These companies bend metal.

Of the companies you mention I like Thermador the best because their star shape burner provides better heat distribution than your typical sealed burner.