You have credited:
Hsu Hsia; did see somebody who looked a like, but it isn't him.
Yen Shi Kwan; did see somebody who looked a like, but it isn't him.
Lau Kar Wing; didn't see anybody who looked a bit like him; he's certainly not one of the five heroes.
Don't believe Lau Gong* and Tung Choi Bo are playing the roles they are credited for, but I'm not sure!

*Are all the Lau Gong pictures, realy one person?