If you mean Spencer's Steve Rogers stuff that starts after Standoff IIRC and actually crosses over significantly with Civil War 2 later. Civil war 2 wasn't good though, neither was Secret Empire which ended Spencer's Cap run.
If you want to read War of the Realms (which wasn't great) you'll need to read all of Jason Aaron's Thor stuff but I only actually liked the first God Butcher arc.
Marvel recs from the last twenty years or so:
Remender's Uncanny X-Force then his Uncanny Avengers which picks up some plot threads from it.
Kieron Gillen's Journey into Mystery was a great Loki series.
Ultimate Spider-Man by Bendis. All 15 years or however long it was from Peter to Miles.
Ed Brubaker's Captain America run
Bendis' Daredevil run
Brubaker's Daredevil
Waid's Daredevil
If Immortal Hulk is on Marvel Unlimited definitely read it, it's amazing.
The big old Cosmic Marvel reading list: