Htryer,
Here is a link to a patch that will allow your half-orc to have the romance option. And, no, Nalia isn't an option at all.
http://members.home.net/mrkevvy/tweaksandcheats.html
(look for
All Race Romance patch)
AFA as another member for your party, you might try Cernd or Haer'Dalis. You seem to have everything else covered.
(but I don't think you have Khalid - he's dead in BGII. Could it be Keldorn or Korgan? Both are excellent tanks).