Fine trumpet , alto sax recordings?

For smooth, agree with David Sanborn, would also check out early Spyro Gyra... a good place to start are the albums “Catching the Sun” or “Carnaval”. Would also try “Wizard Island” by the Jeff Lorber Fusion, or “Breezin” by George Benson.

in the straight ahead vein, I would suggest “Covered” by the Robert Glasper Trio, anything by Billy Taylor, “Time Out” by the Dave Brubeck quartet, “Ballads” by John Coltrane, or “The Incredible Jazz Guitar of Wes Montgomery.

not all of these are strictly trumpet or saxophone records, but all are melodic, relaxed, and accessible.

All great suggestions on this thread... someone mentioned Chet Baker, and I would second that for trumpet, particularly “Chet Baker in Paris”. For alto sax, you might want to check out Art Pepper, particularly “Art Pepper Meets the Rhythm Section” ... both great players that bridge between the smooth and the straight ahead...