The self-titled album's actually the peak of the Phil Collins era, 1983. I've only got Selling England By The Pound, and it's a pretty good album. The first and third tracks are excellent, but the rest of the album kinda lets me down.
And don't neglect their first live album. Very powerful versions of "Watcher of the Skies", "The Musical Box" and "The Knife". I'll add in votes for all Gabriel era Genesis, especially Selling England and Lamb.
Lamb Lies down on Broadway is a great concept album which wound up with PG leaving the band. Trespass and Selling England by the Pound is another. Seconds Out is a good live album without PG. IMO, the band went downhill after Wind & Wuthering.