Hero replacer.

Is there something specific you dislike, or were your expectations simply different?
I must admit, I'm incredibly happy that I managed to give them a standard demonic flag, even if it was done in this way.
Attachment 64780

Grol looks almost the same on the artwork, and Marbas is also muscular, just leaner; let's say that becoming a demon has put him on a bulking diet. Agility isn't needed anymore when he's got hooves (an old joke about why dryads and taurens can't be rogues – their hooves clatter too loudly).

Nebiros and Vayre look very similar. A quote from the fandom: "Jezebeth initially had a slightly brighter texture; I thought it would be better to darken it a bit." (Damn, I wanted to upload the original with separate layers for her body and armor, but I think I accidentally overwrote it.)

On Nimue's artwork, there are even more horns, but my ability to add them is limited. Although, if you remove the last two pairs from the archive, it also looks pretty good, but it wouldn't be lore-accurate. By the way, in a sense, because of Nimue, I put the mod on hold for half a year – I couldn't create a decent armor for him. I'm not much of an artist. Though, maybe I was just tired, and Nimue was simply the trigger. However, the other five heroes were ready last year.

I think Grok already looks very similar, except that his horns are lighter and his armor is red. Well, I didn't want to repaint the armor intentionally; as for the horns, it's like brushing your teeth in the morning – if you don't do it regularly, they get dirty throughout the day.

In my opinion, Nimue's horns turned out really well. And it doesn't matter that there are more of them on the artwork. Honestly, I always thought that all of this character's horns would look ridiculous in 3D model form. You found a balance here between making it look good and remaining somewhat faithful to the image.
Although, of course, there are things to criticize. On the artwork, his horns end with golden elements, and there's also some kind of gold plate on his forehead.
But even without that, he looks great. You really struck a fine balance with the horns. Respect.

Regarding "making him like Agrael," I think if anyone should be made like that, it should be Alastor. He's the only one who's more or less thin on the artwork. And his specialty is magic, and he generally resembles a frail mage rather than a demonic bull.
But he's the only hero whose style would fit Agrael's. And if he were the only one made like that, he would stand out unnecessarily.
Besides, he already looks very good in his current form.

There was something else I wanted to say. Maybe Grol could have darker armor? So that its color matches the metal of the helmet.

As for the demons. The flag is a nice touch (I don't quite understand how this creature runs around on the map).
Overall, I don't even know. For some reason, they don't look convincing. Deleb is passable, but Jezebeth didn't turn out well. This is probably my subjective perception.
Or maybe it's because they are small?
Maybe it would be better to put them on Agrael's lizard and use the dark elf model as a base?