Enemy categories

Hi all, just wondering if we can get a definitive category for enemies

I have heard the bile troll is chaos/monster, the storm fiend is skaven/armored/monster, rat ogre is skaven/monster and chaos spawn is chaos/monster - which makes sense to me

Though most are obvious, infantry is very ambiguous to me for example

Any way I can get a definitive answer?

At the Bottem(Section 43) is a Legend.

Wiki is also complete on that