Pentecostals and the Church of God are not non-trinitarian.
You might specify some group that has deviated from these into non-trinitarian areas.
There is such a thing a "Jesus-Only" pentecostals (United Pentecostal, perhaps) who are non-trinitarian.
Both of the major Churches of God are trinitarian: Anderson and Cleveland. (Herbert Armstrong's group 'The Worldwide Church of God' was non-trinitarian.)
Specificity helps.
I wouldn't even consider today's Unitarian universalists Christian at this point. They tend to be a catch all for people wanting religion without the attachment of essential doctrines.