I really like this match between Daryl Peach and Francisco Bustamante:
https://www.youtube.com/watch?v=uXB1P0l-tyY
This match is a serious roller-coaster ride and it's the whole match that stands out to me. While I won't spoil the crazy match ending, Bustamante really shows some absolutely amazing perseverance in the moments where the chips are down for him... I think it's an amazing demonstration of focus and determination.
I also love this short match between Darrel Appleton and Johnny Archer at the 2009 Mosconi Cup, day 2 match 4 (broken into 7 parts):
https://www.youtube.com/watch?v=boolZ0goHus
I was there at the MGM to see it live, and it was amazing. In a mega rowdy room that was probably like 90-degrees hot due to the TV lights, Appleton was cool and collected and as always he played fantastic. But it wasn't going so well for Archer...
But again, I won't give it away, but I will say Archer really shows what he's made of despite the worlds weight upon his shoulders. It doesn't show as much on the screen, but I could see the stress on his face, the sweat pouring off his face from the heat and the pressure, and I thought surely nobody could pick themselves up with the the feeling of the whole room standing on your neck. However it looks for him on the screen, it was worse to see live. But it was a great match between two amazing players..