Board Thread:General Discussion/@comment-28503619-20160520045652/@comment-24769684-20160522220010

The guy asking the question seemed to legitimately want to know which Espada were Vasto Lorde, so that's why I've been trying to give a solid answer unmarred by speculation.
 * Starrk was only shown as an Arrancar, as he became one naturally.
 * Halibel was only shown as a Hollow in anime filler, which isn't canon.
 * That is true for Ulquiorra and Barragan. However this alone is not conclusive enough to label them Vasto Lorde, as Toshiro only gave vague descriptions due to never actually interacting with one.