My favorite one vs. many fights:

Billy Chong fighting the 'Japanese' swordsmen in Sun Dragon.

Gordon Liu storming the Taoist temple the 1st time in Fist of the White Lotus.

Jackie Chan at the finale of Dragons Forever.

Sammo Hung making his attackers spit rice near the end of Pedicab Driver.

Moon Lee using her nunchaku at the opening scene of Iron Angels.

Tony Jaa's bone-breaking scene in Tom Yum Goong.

Liang Jia-Ren in The Victim.

Bruce Lee in Chinese Connection.

Lau Kar-Leung in a short few-on-one fight before the finale of New Kids in Town.

Jet Li at the end of My Father is a Hero (forget the yo-yo sequence and it's still a good scene).