Here are five really good albums from artists your brother probably never heard of, but which should appeal to his sense of taste for good old rock 'n roll.
1. Wilco - Being There (or Summerteeth)
(The later albums (especially Yankee Hotel Foxtrot and A Ghost is Born) are also good, but might be a bit too Avantegarde for him now. When he gets into Wilco though, he'll find both of those albums are at least as good as the other two I recommended.)
2. Death Cab for Cutie - Plans (or Transatlanticism)
(Ignore the band's name, and trust me that this is a very good group, and both of these are very good albums.)
3. The Decemberists - The Crane Wife
(A very english sounding band, IMHO anyway, even though they are not from Great Britain.)
4. Fiona Apple - Tidal
(A great singer/songwriter, who does not try to hit you over the head with her vocal range, unlike some lesser women singers, who shall remain nameless.)
5. Coldplay - Rush of Blood to the Head
(This is their best album by far, IMHO, but their other albums are very good too, just not up to the standards that this one set.)
In case your brother heard of this last one, (and he very well might have, as this was a really popular album), here are some alternative suggestions: either Oasis' "What's the Story Morning Glory?", (espeically if he likes the Beatles), or if he just wants some good old fashioned fun Rock 'n Roll, The Fratellis' "Here We Stand".
My two cents worth anyway.