他 (tā) is the standard third-person pronoun for 'he/him' in modern Mandarin. Unlike the listed siblings, it is a personal pronoun, not a demonstrative or possessive — 其他 and 别的 mean 'other/else', 另 means 'another', and 之 is a literary particle/pronoun used in formal writing. Use 他 for a male person (or when gender is unknown) in everyday speech.