Wu Anquo and Wang Xiu did, indeed, serve Kong Rong (as did Taishi Ci for a while).
And Jin Xuan had only himself, his son Jin Yi, and Gong Zhi. This is the normal difficulty version, so he gets officers from several neglected forces (such as He Jin, who was arguably the most powerful man in china until he stupidly let the ten attendents find out that he and Yuan Shao were thinking of killing them).