As it happens, although my taste often chimes with Bob Farr's, in this case I agree with you in that I gave Anna Moffo's Violetta a strong endorsement in my survey of La traviata:
http://www.musicweb-international.com/classrev/2021/Jul/Verdi-traviata-survey.htm
and the only reason neither she nor Caballé is my first recommendation is because I always put Callas first and I like the less well-known Gardelli recording so much.