Those who know me also know I love mohair. It can be combined with laceweight wool or merino or added to a heavier yarn in order to improve stitch definition. And I love big collars, too. Here is a seamless top down customizable raglan. The collar is the last thing to knit, so you can decide at the last moment about the length and the width of the collar.
The pattern is available on Ravelry.
