After I left the JW's a belonged to an evangelical (fundamentalist) church for a number of years. Those people do not think of JW's as fundamentalists. The fundamentals can be found here:
https://en.wikipedia.org/wiki/The_Fundamentals
A few things quickly stand out, as doctrines at odds with the Watchtower. The Deity of Christ, The Personality of the Holy Spirit, Justification and Salvation through Grace alone. Regarding their understanding of the Bible, I've read some Christian writers (Walter Martin, Anthony Hoekama) who point out JW's don't recognize the final authority of the Bible. In Watchtowerland all Scriptural interpretation is filtered through the pages of the Society's literature.