@William. Is this relentless application of rule of thirds template really the way to go?
Check out the making of Seinfeld documentary at the end of the DVD box set for seasons 1&2. 45 minutes or so - dozens of interviews. You will notice all shots are composed with the interviewee in the horizontal center of the screen. Let me know what you think.
The project often mandates safe for 4:3, which limits pushing your subjects too far into the off-screen areas between that and 16:9. Too many people are framing eyelines at 3/4 frame or even 7/8 frame height and it's a claustrophobic composition. Unless you want your viewers to crouch in their seats, of course.