Honestly, you leave a thread for a couple of hours to get the kids tested for Covid-19 and when you get back it’s all over the place!
People who’re not into “classical” music miss so much: it’s not all the same. It’s a lot more diverse than rock.
Pick and choose: I’ll propose Beethoven in general; Stravinsky‘s “Firebird” and “Rite of Spring” for their familiarity; “The Planets” by Gustav Holst (I fantasized many years ago about arranging that for a rock ensemble); Symphony No. 9 in E minor, "From the New World" by Antonin Dvořák; “The Grand Canyon Suite“ by Ferde Grofé; and for those who enjoy F. Zappa, there’s his classical analogue, Professor Peter Schickele a.k.a. P.D.Q. Bach. (You’ll get much more of the humor of P.D.Q. Bach if you already have a fair grounding in classical music).