What's the adjectival form of "evangelist"?

I have a question about how to write the following:

1 Timothy, 2 Timothy, and Titus are commonly known as the “pastoral epistles” because they’re allegedly written to pastors. However, the recipients were evangelists (2 Timothy 4:5), which are distinct from pastors (Ephesians 4:11). Therefore, they could more accurately be called the [BLANK] epistles.

The [BLANK] is the adjectival form of evangelist, but I don’t know what that would be. What’s the adjective for evangelist as used here? Thanks!