The 18 days war of Kurukshetra did played havoc and many lost their lives. Sure there are few who would have survived and lived past it. Out of those who other prominent personalities lived past that event?
For sure, I know these: Pandavas, Krishna, Ashwathama, Krupar. Who else?
Edit: Any idea about Jambhavan who lived across yugas right from Trivikrama period to Mahabaratha?
Also, Parasurama seems to appear in Ramayana and in Mahabaratha (who fought with Bhisma on request from Amba/Ambalika). These two were reminded when I stumbled on this page.
Then is the Sage Vyas who I could see in Mausala Parva at the end.