Tengen Toppa Gurren Lagann, Steins;Gate 0 Recommendations
In both series, the mc has someone he loves/idolizes died, and this first make the mc depressed but then also become his biggest motivation throughout the show. The person died also still appear in almost every episodes and play important roles in the plot even after their death. The difference is TTGL is more shounen action and Steins Gate 0 more sci fi drama. But both series are pretty good to make you more high spirited and less depressed.