Hi!
My name is Leena Cruz I'm a professional illustrator and graphic designer, I have experience designing characters, logos, branding, posters, flyers, brochures, creating illustrations for children's books, casual games, magazines and cover art. I love manga and have read almost all the titles you said (except Nanatsu no taizai and kongou banchou) I think you have great aspirations for your manga and that's very good, but also it's a hard way to go, so let me help you. My bid is for one page in black an white, finished with detail and toning. You can adapt the number of pages for your budget and start working. You can see samples of my work in my portfolio, I only do paid samples so give it a good look. If you need help bringing to life your ideas just call me, I'm sure I can help you, guaranteed.