How about Mecha Quinn?
I'm not a huge fan of Quinn but I think she's fun to play when you hit lvl 6. Was thinking of skin for her and Mecha makes the most sense. We have a transformer like SION ultimate skin and he transforms into a train when he ults so what about the same thing happens to Quinn when she uses her ult but instead transforms into a fighting jet? When damaged she goes back to her humanoid form and missiles rain from above instead of arrows.
Her W could be like recon drone taking a picture etc etc... What do you think?

and the others mentioned above but no real humans.