Yep! Lot of blurs between them.
The pastor role is about tending the flock, about feeding the sheep, grazing them. Pretty important, because our Lord Jesus asked Peter 3 times if he loved Him, and each time told him to feed His sheep.
Jer 3:15
15 And I will give you pastors according to Mine heart, which shall feed you with knowledge and understanding.
KJV
Because of so many divisions within Christ's Body today, small Churches often don't have one in the 'pastor' duty, usually a called evangelist fulfilling that instead a little. I feel that's one of the reasons why so many are lacking a complete Bible study.
Some of the larger Churches near me have a separate pastor, evangelist, and several ministers (like you said). Some in the congregation get upset because the pastor doesn't go around visiting like a minister. That pastor is a Hebrew and Greek scholar, not really his called duty to be a minister, nor an evangelist that is called mainly to preach The Gospel.
I think WE ALL should be able to preach The Gospel of Jesus Christ as a minimum.