The Gospel in the Epistles

I've had it on my heart for a long time to do a particular homework assignment.  I want to find where the gospel is explained in each of the epistles.   This will not be an exhaustive list.

Here we go:

*Romans 5:1-11

1 Corinthians 6:11, 14, 19-20 
1 Corinthians 11:23-26
*1 Corinthians 15:1-8

*2 Corinthians 5:14-21

Galatians 1:3-5
*Galatians 4:4-7

*Ephesians 1:4-8
(and pretty much all of Ephesians 2)

*Philippians 2:5-11

*Colossians 1:13-23

*1 Thessalonians 5:9-10
1 Thessalonians 4:14

2 Thessalonians 2:13-17  ?

1 Timothy 1:12-17

2 Timothy 1:8-11

*Titus 3:3-7

Philemon ?

Hebrews (so many!)
1:1-3
5:7-10
9:11-15, *24-28
10:10
12:2
13:20-21

James 1:18 ?

1 Peter 1:18-21
1 Peter 2:24
1 Peter 3:18

2 Peter 1:3-4 (slightly more clear in other translations)

1 John 4:10 (there are more in this book--quite a few, really--I think this one is clearest)

2 John ?

3 John ?

Jude 21 ?

Some of these proclaim the full gospel more clearly than others.
It would be interesting to consider what aspects of the gospel each of these scriptures highlight and emphasize, and then synthesize an understanding of how they work together in stereo.

That would make a long blog series, or maybe even a book.