During DGSD, quite a few people had the misfortune of having their inner power drawn out of them by Deun Yu via his Bak Ming Sun Gung. Let's put together a tally of all people known to have had their inner power absorbed to some extent by Deun Yu:
1. a few Mo Leung Sword Sect disciples who were holding Deun Yu prisoner; these were his first "victims"
2. Divine Crocodile (on two separate occassions)
3. Deun Yin Hing
4. Yellow Eyebrowed Monk
5. Wan Chung Hok
6. Chung Man Sau
7. Gum Bo Bo
8. Chung Ling
9. that creepy servant of Madame Wang who wanted to turn Ah Chu and Ah Bik's arms into fertilizer
10. Kau Mor Tze
That's all I know about/remember, but I suspect there were more. Still, if you add up the inner power of all those people, that's quite a bit.