ASOS Cardigan In Textured Yarn. Ok, I know you'll think this one is weird, but hear me out. This could look really good on your body type with your hair color in a kinda slouchy old man chic. You just need to style it properly(the model actually does a pretty good job) a white t-shirt and dark wash jeans are a must. Seriously though, that color palette, plus your dark hair, would be an awesome combo with really great contrast.
ASOS Zip-Through Hoodie. The key to a good hoodie is fit. Your green stripe one is too big on your frame, and the color makes you look young and immature. The best way to look more adult while wearing a hoodie is simplicity and fit(and good dark wash jeans).
ASOS Wool Jacket With Funnel Neck In Black. Peacoat's are a great staple, however, they may not be the best for your body type. The double breast buttons may over whelm your frame, but if you can get one tailored they literally look good on everyone and never go out of style.