Trying to work out where Huang Chun-fu (黃春福), the chairman of Miramar, and Huang Chun-fa, also involved in the hotel arm of the group, fit into all this.

If, and that's a big 'if', the TT article is correct, then:

Father: Huang Jung-tu (黃榮圖), deceased, natural causes
Brother 1:??
Brother 2: Huang Ming-huang (黃明煌), shot dead, initial target of shooter
Brother 3: Huang Ming-jen (黃明仁),intervened and was shot dead
Brother 4: Huang Ming-te (黃明德), aged 54, shooter
Brother 5: Huang Ming-tang (黃明堂),hid in another room and called police
Brother 6:???

Are there only 6 brothers?
Which brothers are from which marriages?