Speaking from experience, I’ve been in the situation of working with a group of folks who were tasked with getting something done where the whole group did not agree with what they were being asked to do. In the end, the team got the job done as requested. There were times throughout the project where different folks took on the Task Driver role, but only from the standpoint that the work had to be done, even if the team didn’t approve. In each case I suppose you could say that each person was a reluctant Task Driver.