I'll take your second one first. Riker was speaking therefore he was the center of attention:
As for your first one, it depends on who's currently talking...if Riker or Worf then this:
If Picard or Troi then this:
If all for are having a go at it then you're going to either use the Riker/Worf framing or do a vertical P&S.
The latter shot is wretched in both crops. Either it's placed the lead too close to the bottom of the frame or it cuts off Worf and the top of Riker's head. They're both compositionally bad.