Stephane Paul Keller is a Cameroonian centre-back born in Grand Batanga in 2001. He came through Fortuna Yaoundé and Deportivo Alavés, made his senior debut for Alavés B in 2020, and appeared for Alavés in La Liga in 2021. Keller spent the 2024-25 season on loan at Istra 1961, then joined AEL Limassol before moving to Al-Ittihad on loan in 2026. He played for Cameroon under-23s in 2023 and made his senior international debut in 2026.