The legislation of the Parliament of Canada Act is clear that the role of the PBO is “to support...the quality of parliamentary debate”, for example by providing macroeconomic or budgetary forecasts. I see the PBO as supporting parliamentarians. The Parliamentary Budget Officer should not lead the debate but rather support the debate.
I will step forward and explain analysis. I will ask the tough questions. I will do the pointy homework to support those debates. I don't have a view of where I should be on people's radar. I'm happy to step forward and explain things if they need explaining; I'm also happy to let the work speak for itself. That's how I would approach your question.