Hey there Kjedhal,
I am an officer for Faceroll, we’re a 2-day raiding guild. We’re reforming after taking a break for most of BfA and looking to get back into Mythic progression. Our Thursday raid times fall right into your window, not sure if that weekend flexibility also includes Friday, we go until 12:30am EST on Friday.
If you’d like to know more, here’s our post.