The Adventist Pioneers were "heretics" according to the SDA Church today.
"the anti-Trinitarianism that predominated among the early Adventists was not
a momentary lapse in doctrinal understanding, a lapse that Ellen White could easily correct with the stroke of a pen, but a heresy that has lasted for generations. Many children of the Adventist Movement, as Seventh-day Adventists, descended into the grave six, seven, and eight decades later believing that the Son and Holy Spirit are lesser beings."