Find a strip mall tailor (i.e. you are looking for cheap - usually around $10-20 per shirt) with good reviews and get any shirt you like.

I'm not skinny but i am tall. However, everything big and tall (i.e. 3x-4x) just looks way too wide on me. So I buy the 4x and take it to them, they pin me up and within a week i have a perfect set of shirts. Yeah it ends up costing a bit more but the outcome is much more comfortable and just looks cleaner.