This is based on opinion. Please don't list it on a work's trope example list.
Tear Jerker / Infinite Space
Fighting the soldiers of SMC nations those have been conquered by Lugovalian Empire.
Lord Roth clutching Nele's headless body and telling her how he's ready to settle down and be with her now, all the while he is overloading his ships weapons (which is guaranteed to destroy him and his ship) to punch a hole in the enemy fleet to allow Yuri to get through.