Well, speaking about proportions, I probanly unintentionally made models a bit less bulky, but this picture proves that in general they are quite the same.
Also, your replies are rather discouraging, because they have not got any hints on how to improve the models but only proclamations that it is not good. Sorry for my agressive style, though. I had some issues at my job recently, so I probably overreact on any criticism.
They not same - using original sprites for inspeartion not a good idea since they are may be in different poes, too low resolution and not maded very good. But still - on this pic I edit it may look not good, but his leg actually much longer, he just walking and leg not in idle position.
About body proportions - I think best be to fistly just model or steal model of base human, and then "dress" it, since look like for 3d models authors use same 3d model as base. Your current body proportions are way too cartoonish for my personal taste. And make system like in more modern games tes where there are races with base-bodies and all other stuff is just armour and different effects on body. There are no reason to keep flat people and "humanoid" monsters since it was just because limitations of sprites, system requres and dev time during development of tes2
Second - question of detalisation and finished look for me always important. Your current models are quite high poly, but still very low detalaised. They look very soft and modern - but same time very, very plastic and very cartoonish. It will look not good for me personally. And if you add more detalisation and textures - it will not fit in original game at all. Original sprites renders of monsters had not very big detalisation too, but artists make ILLUSION of their detalisation on sprites by good shadows and animation, but same model will not work if they pur actual 3d model they used to render in game. That's why I so on low poly - with classic low poly modelling you may same time do not so detalised model, but draw on texture all requred detalisation and it still will fit perfectly in original game.
Also, about oriinal 3d renders - you don't notice all look like plasticine-rubber? Clothers use similar wierd colors and textures on original model are so... monotonous? That's because 3d rendering and all that stuff was pretty bad in that time - me personally don't like this style even when it used to make 3d rendered sprites. 3d rendered sprites alway are more low quality compare to hand drawed ones...
What I actually mean - At first, textures are very, very important and they need be not simple, since original game is wery artistic with a lot work on this side. At second - I think that this will be much more logical just start from original bodies and than do a little bit more complex mod that remade all or at least most important flat people and human monsters into actuall system race-and-dress-on-it like in tes3-tes5. And at last - choose different style. Not only me not like style of current models, and a lot people will have opinion that dagerfall with that will peobably look like not very good indie game.
Ah, also, you may ignore what I post, it's really your opinion what do or what not to do, just say that your current way requre a lot, a tons of professionalism and it will be very hard to make really attractive models and animations with 1-1 original style. There was guy on XL that was try to do like that - https://www.youtube.com/watch?v=j_DsYtvacxk
Yep, may look not bad, but I don't really know how actually it will look in game, Probably, not very good.