Thomas Shey
Legend
I dunno, I've seem expies, especially in the late 1990s/early 2000s from non-DC/Marvel outfits, who were I'd say closer than that and generally didn't attract any kind of legal attention. I think naming and powers would be much more the issue - so long as the names are clearly distinct (i.e. no Iron or Man for power armour lady, and no "Bat" or "man" for the cloak guy), and they have some kind of power difference (like cloak guy has some sort of supernatural or superpowered element) they'll be fine.
The power armor illo for a female is not actually their example character. This guy is: