14. Wolf 359
Episode: Best of Both Worlds (4.01)
One reason I enjoy the second half of this episode is that despite everyone knowing that the Borg wasn’t going to take over the entire federation, the writers didn’t limit the damage to just a few deaths. For the Borg to remain a formidable enemy, they needed to cause some massive destruction. And they do. And it’s all shown with very little dialogue. Dropping the name of the ship that Riker turned down was a nice touch.
13. Data Makes His New First Officer His Bitch
Episode: Redemption (5.01)
The title says it all.
Death By Troggles 
Loved both of those scenes. I never registered that one of the ships lost was one of the ships that Riker had as a possible commission. I’m glad you pointed that out.