I like your designs. I personally like the #3 better "The Purple Lackey" design. He looks ready for everything but somehow looks as if he would be very bad at the everything he tries to do and end up in some messes lol. Or at least this is my thought when looking at him, I don't your plans or directions in the webtoon you want to create but he stands out the most for me.
The second one reminds me of something belonging in Looney Tunes and the first gives me Cartoon Network feelings.