The easiest to knit and to size right are top down raglan sweaters. There are pattern generators at www.knittingfool.com
and at www.thedietdiary.com/blog
You just put in your gauge and the chest/bust size you want and it makes a pattern for you. You can try it on wher you get to dividing the sleeves and see how it's going to fit and adjust by ripping back a few rounds or knitting a few more. Shoulder shaping is done by increasing on diagonal lines from the neck to underarm.