I think "better" isn't something you will easily find with
GW models. It's not just that their upscaled models generally benefit from bigger bases due to their size, but
GW has a habit of doubling down on it by sculpting poses with legs spread wide. As Duskweaver said, it's physically possible to fit most of these models on 25mm bases. The deciding factor is going to be how much you can get behind the feet hanging over the edge a little. For most models sculpted for 32mm it wouldn't be that much, but you'll find a lot will either stand at the very edges of a 25mm or hang over slightly. You'll get a consistently cramped look out of rebased models. Some like it, others don't.
I tend to rebase my models on 25mm as well. I don't seem to have any pictures of
AoS models where I got overhang, but here's a new Battle Sister whose size is in line with modern
GW humans. You'll be looking at that kind of overhang. In this case it's just tactical rocks, but ultimately it's still caused by the wide stance.
Here's also a
WIP one. Not sure if you can see it well, but for things that hang over the edges I use green stuff to sculpt a concave support piece underneath. Structurally unnecessary but helps smooth over the look a good bit. Might be something of interest to you.