Katherine Squire (See Soap Hoppers) was Alice Lovelace, an early member of Ina's household.
Stephen Schnetzer's Marcello Salta lived there, also, I believe, romancing housemate Katrina Karr (Nancy Snyder).
Karen and Marco
Jill Voight's Becky Lee lived there. Mary Gordon Murray moved Becky into the "Carriage House"
Ed Hall befriended Karen there
and I think you're right about Herb during a Dorian breakup
(from the infamous elevator)
Another World never improved in the ratings after 1979. Never once got above number 9, whatever shenanigans they tried: Bringing back Steve and Alice; devoting a third of the cast to crime/mob stories; firing Beverly Penberthy; the comedy of Felicia and Wallingford; the return of Iris; beautiful huge sets courtesy of Jill Ferrin Phelps; Vicky Wydham as Justine, the Lumina plot; a gorilla in the final episode. Nothing raised the ratings.
I wonder if anyone ever considered returning to class-conflict with a middle-class family as the core? Obviously not.