Scud-dog,
I am biased toward Scott G so my answer is obvious!
On a more objective level:
I've always considered the IM6/WT to be a medium-fast action rod(4wts & 5wts). The TMF would be the best candidate for the medium category.
I've always considered the Scott G to be on the slow end of the medium-fast scale/ or the fast end of the medium scale.
I've always considered the Sage LL to be a medium-fast rod.
I've always considered the LPS to be a medium-fast rod (9' 5wt and 3wt) but I do know that some of the shorter rods in the lighter weights are definitely a medium action.
I've considered the Dback Classic to be a rod that casts like a medium-fast rod but fishes like a medium rod.
I haven't had time to fish the Dback Diamondglass.
Orvis has a contender in this category but I am not familiar with it... something like Super Fine or Far and Fine???
I'd rewrite the list to be:
Orvis (whatever it is?), Sage SPL, T&T Paradigm, some T&T LPS, D'back Diamondglass (there are probably a number of glass manufacturers that can be added here but I am not familiar with them), Dback Classic Trout, Cabela's PT, and maybe Scott G depending on definition of medium.
And you may want to consider bamboo
My .02,
CG