I saw the first Turtles film, and thought it was decent enough. Not seen the sequel though, so can't comment on that. A lot of his executive producer credits seem to be on TV projects that haven't crossed my path (Black Sails, Last Ship, Jack Ryan).
Last Ship was pretty interesting. A virus kills of the majority of the planet and a navy ship is sent to collect a scientist who maybe able to create a cure. then they have to suvive viruses, pirates, foriegn powers, storms etc. It could have been cheesy as hell but it was played seriously with bays usual eye for military details.
It probably ran for too long, but the early seasons at least were very good.
To be honest, Ralph, BB Bumblebee is a completely separate character to Bay's Bumblebee. The only thing in common is the lack of voice, and that is given a proper on screen explanation, and the film makes it work so so well.
It is the 'best' TF film, as in it's a film that actually wants to be a film, not either an extended advert or an excuse for explosions. And I say that as someone who adores the '86 film.