I hate seaming as well so I'm going to start a sweater knit in the round after the New Year using Elizabeth Zimmerman's EPS method. It's in several of her books, like Knitting Without Tears
, which you can possibly get from the library, if you don't want to buy a copy. It's pretty reasonably prices though and a great read regardless.
Also, I found this site when I was doing some pattern searching - a custom top-down raglan, you just fill in the blanks based on your measurements and knit away (that's the plan anyway, lol)