Vote for the Chloroplast, because:
We produce energy: Unlike the mitochondria, which only uses what's already there, we make energy from sunlight. Mitochondria can’t even operate unless something else feeds them. Chloroplasts? We get the job done by making energy from scratch.
Essential to life: No chloroplasts = no oxygen. We’re not just "helpers" like those little ribosomes. We are life creators, turning sunlight into glucose that fuels the entire ecosystem.
We’re reliable: Unlike organelles like the Golgi Apparatus, which are just packaging proteins, or the vesicles, which are basically cellular couriers, we’re directly sustaining life.