I am 15, 6'4" and 175. I need help getting clothes that look good on me!?

I am male, 15 years old. I am 6'4" and 175lbs. I do not like any preppy clothes(i.e. American eagle, abercrombie&fitch. that sorta thing) I hate it. I shop at skate shops and hot topic. All the clothes I ever find when I'm shopping are always very roomy in the waist, and I hate that so much, but they think if your that tall then you must be filled out, which I'm not. And all the pants I find are always very roomy, and I like slim fitted jeans that aren't airy in any spots. And I like to wear hoodies, But they are always very very roomy in the bicep area, which I do not like. And FINALLY, I have a very nice pea coat which I look very good in, but the sleeves are a tad bit too small, and the waist is too roomy. So basically I need to find non- preppy clothes that are slim fitted for very tall and slim men. Please give advice, personal opinions, or knowledge you have. Thank you