There is an article The Church fathers - Advocates of Bible Truth? in the Watchtower of April 15, 2001 which concludes that "the Church Fathers allowed 'misleading inspired utterances and teachings of demons' to take root in the Christian congregation.". That is hardly an endorsement.
I would also note that there was some confusion as to who or what Christ was until teachings were defined in various councils. Naturally those whose writings supported the (now) orthodox teaching were copied and promulgated as authority. Those whose writings did not support the new orthodoxy were simply not preserved. So in consequence we have very little record of the many who did not support in some way the teachings which later became orthodox. Thus the only authority we should rely on is scripture itself.