Here are some quest/encounters that might be relevant in terms of virtue:
1. North of the Friendly Arm Inn (AR1400): Farmer Brun's Son quest
2. Beregost (AR3300): Marl the Drunk, Silke
3. Nashkel (AR4800): Minsc, Edwin & Dynaheir, Oublek (the guy who mistakes the PC for Ghreywolf)
4. Carnival (AR4900): Zordral & Bentha (zordral is about to kill bentha)
5. Area W of Nashkel: Xvart Village
6. Area SW of Nashkel (AR5200): The Dryad and the Oak
7. The Nashkel Mines (AR5400): Prism's Final Masterpiece
8. Area E of Nashkel Mines: Lena and the body of Samuel
9. Area S of Ulcaster: Hulrik, the Xvarts, and the Cows
10. Cloakwood Mine (AR5400)
11. Baldur's Gate: Ramazith & Ragefast's Nymph, Brielbara and Yago's Book of Curses, Ghorak the Diseased, The Noblewoman and Cyrdemac
That's all i can think of for now