Which global companies are recommended as a benchmark?

I think we need a new term for this. Most companies have had professional services of some form, there are very few B2B solutions that do not include professional services. Some organizations provide these directly, others through partners, but virtually all solutions when delivered at scale require some level of professional services. IBM is the classic example of this, but I suggest SAS Institute (the data analytics company) is a more compelling story.

I have been using the term Service Led Growth to describe a business model where services, software and data are combined to create an integrated system with each contributing to the other's value and working together to drive revenue.