Palmares includes good losses only if you are distinguishing between minor riders. At the top end - which is clearly where Valverde belongs - only wins matter. Valverde is too high up the ladder for third places to move him significantly. That's not an anti-Valverde attitude. It's an attitude that assumes he belongs with the top tier.
Meaningful results aren't just the "big nine" races (3GTs, 5 monuments, WC). Down the scale they also include, although with a lesser weight, the big non monument classics, the biggest one week races and GT stages. This year Valverde has out of all of those races Flèche and, if you are feeling generous, a second win in San Sebastián. Other wins are important for riders that aren't multiple winners of big races. They are a big deal for a Sonny Colbrelli or a Sam Bennett. They aren't important for a guy who has won the Vuelta and LBL twice.