in a fit of boredom i made these things, don't expect much but they at least can fly and shoot. i gave them some arbitrary classes and some stuff in the description of them, ill denote each class with a letter in brackets.
assault (a)
sniper (s)
brute (b)
elite (e)
first up in the small category, Poltergeist (a)

next, Reaper (s)

next, Ghoul (e)

onto the mediums, first is Giant (b)

second in mediums, it's Titan (s)

last medium, the Behemoth (e)

the final category, huge mechs, we got Emperor (b)

next in line, Kingsman (s)

last mech, the Crusader (a)

and yes, i've used krooms forge, decals, and armor expanded for these.