Hey, Socreta and Subhumanoid thank you for your posts!
For rock genres I have mostly played vintage pop rock (e.g Pink floyd/Beatles) and vintage rock n roll (Elvis/Chuck Berry).
I am very much into country, folk, blues and play these quite often. Sometimes I play classical pieces or regular pop songs.
All of the christian songs I've played so far have been country or folk songs. But I think "cool rock" to me is just anything that sounds "chill" (i.e laid back) or anything that is more energetic and really pulls you in. And of course awesome guitar instrumentals are a huge plus.
I am really enjoying Ashes Remain and Third Day.
60/70s rock is not my thing. Nor is country or folk. I like blues, but don't often listen to it.
Check out Glen Kaiser. He was the vocalist/guitarist of Christian rock band Resurrection Band (Rez Band). You may like them, as well. But his solo material was more blues/folk/acoustic. He was also a pastor, ran a homeless ministry, a father, husband, record label owner and ran the largest Christian rock/metal annual festival, Cornerstone.
The bands first demo was put out in the mid 70s and they lasted for 20+ years. Here's an amazing bluesy song the band did.
Another cool, but different recommendation is Eric Clayton and the Nine, released just a few weeks ago.
Eric Clayton was singer or 90s Christian goth rock band Saviour Machine, and had to quit for medical reasons. Lyrics tend to be more on the deep and personal side. The music is atmospheric and often mellow, but can get intense at times.