First you need to decide what exactly is Technical, Analytical, Creative and Functional.
and/or the combination: for example Technical&Creative can mean... we need to have more out-of-the-box tests in the test automation.
Brainstorm this and document it.
Make sure you have at least 4 (or 8 or 16) persons to vote for direction.
Make sure to plan this event every year.
A result for example: Technical & Analytical, means you understand that the group of testers should become more Technical, and more Analytical.
This means action points for year xxxx!!
this is the basic idea. please send an e-mail if you would like to help explore this idea further.