Scaling regarding Tomy/Classic Trackmaster

(Photo by thatonetraingu1)

Surprised the ERTL ones weren't mentioned yet. They do have Smudger and Bertram, but obviously not Freddie, Mighty Mac or any of those created after them. They're a good option and can also fit on Capsule track, the direct "narrow gauge" counterpart. An ERTL Smudger next to a Plarail Henry:


(Photo by Charles/@_Skarloey)

There's also another user who showed engines 1-6 on Capsule track next to Thomas, but I can't remember who that was.