Or you could do a raglan sweater, or a drop shoulder sweater using steeks, which is what I do most of the time.
I've done what Ingrid mentioned many times, but I always thought that steeking produces the same result, you just knit up to the underarms, start the steek, knit, and then start the neck steek. Then you finish the shoulders with a 3 needle bind off, cut the steeks, pick up the stitches, and finish the sweater. Steeks are really a bridge to allow you to knit the entire sweater in the round. Great for colorwork (except intarsia).
Raglans are great, too. You knit the body up to the underarms, than knit 2 seperate sleeves, knit them onto the body with stitches on holders at all 4 underarm locations, and then decrease the sleeves onto the body, and knit a neckband.
That's the general idea
I could help you calculate your pattern to be knit with steeks or like Ingrid said, if need be, but I'm pretty sure that you wouldn't want a raglan sweater for that pattern, though.