Both Delevantes cds "Postcards From Along the Way" and "Round About That Time" may now be out of print, but are definitely worth seeking out.
In a more traditional vein, you might enjoy Alison Krauss & Union Station which features AK's great voice and Jerry Douglas great guitar and dobro. I'd start off with "Now That I've Found You" (greatest hits) or "So Long So Wrong" and note that the live album features more of Douglas' playing- if virtuoso guitar is more your thing.
Robert Earl Keen's "#2 live Diner" and "Picnic" are crossover rock/country with clever, often very funny lyrics.
The Reivers (all cds, especially "End of The Day") and Uncle Tupelo (all cds, especially No Depression) are even more towards the rock end of the spectrum, but both bands were really influential and worth hearing if you don't know them. Reivers are more harmony driven pop country, while Uncle Tupelo is a mash up of banjo and garage that mixes genres in a clever, expansive way. Uncle Tupelo also spawned Jay Ferrar (Son Volt), Jeff Tweedy (Wilco) and less directly Jay Bennet (especially Jay Bennet and Edward Burch "The Palace at 4 AM") and Brian Henneman (Bottle Rockets). All worth hearing in either a broad "new country" or "y'alternative" kind of way.
