So if I'm going straight top 4...
At Cameron & in the Final Four in 2022. The latter is (in?)arguably the biggest game in the history of the rivalry and the former was one of the most satisfying Carolina wins in the rivalry.
"The Comeback" in 1974. The granddaddy of them all for great Carolina wins against dook. Down 8 with 17 seconds to go and to end up winning the game is absolutely amazing.
The "Marvin Williams Putback" game in 2005. Going into that season, dook had won 15 of the last 17 games since the beginning of the 1998-99 season and we all know what had taken place over those years. This game announced that Carolina, under Roy, was really back and that the upcoming years would be far better than the previous few had been.
After that, i think you have an assortment of games that are great but don't quite have the grativas of those 4 games. Here's a brief list (in chronological order)...
1986 Opening of the Dean Dome
1989 ACC Title game
"Bloody Montross" in 1992
The "Double Blowout" in 1998 (including the greatest missed dunk of all time)
The "Bloody Felton" game in 2003
2006 at dook when Hansbrough & Co upset the dookies in JJ Redick's last home game
The "Bloody Hansbrough" game in 2007
I think the "Seth Trimble Game" is likely among these games (albeit near the bottom for me). For these, I think where you were in life when they happened likely has a significant impact on how important they are to you (for me, Bloody Montross and the 1998 game are the most treasured).