I'm no expert, but one of them, the non yellow poly doesn't quite look an ornate. Shouldnt be the problem though. Can try the driftwood maybe.
+1 to everything dr. B just said ... Be careful with ljs around smaller bichirs ... But my laps have never been aggressive at all not even in the slightest it's the endlis .... Also if this helps ur decision at all ... I have a 14" lap and I introduced a 5" endli to it who got along fine ... At the time the lap would only eat live fish and nothing else but it didn't bother the 5" endli ... That bein said that is just my experience that does not mean that the lap u get will be the same wayI personally would be cautious in general with introducing a lower jaw with small upper jaws. Out of all the laps and lap variants I have none have shown any noticeable aggression. If I were you I would try and bulk the ornates up as much as possible, otherwise the lap may see them as a possible food target. IME though laps seems to be very laid back and if kept well fed should be fine. I would just be cautious and make sure everyone is kept well fed.