JoustGod wrote:"Something" never reached #1 on the Billboard charts. It peaked at #3 as the b-side to "Come Together".
I'm not sure I agree with you a hundred percent on your police work, there, Lou. First, "Come Together/Something" was a double A-side (unlike "TLaWR/For You Blue"). Second, it actually peaked at #1...just for a week, November 29, 1969.
But, while double-checking that, I did discover something interesting. I don't have the original charts lying around, but Wikipedia says, "'For You Blue' was listed with 'The Long and Winding Road' as a double-sided hit when the single hit number one on the U.S. Billboard Hot 100 in 1970," even though "Road" was clearly the chart-topping A-side.
I'm not sure why Billboard listed it that way, but apparently they did. Still, it doesn't make "For You Blue" the only
Harrison-written Beatles #1, as per the question. If there's only one, it's got to be "Something," the double A-side. But I wish I'd known about "For You Blue" in advance so I could have written the question more carefully. Thanks for pointing it out.