The lord of Taurus in Vedic astrology is Venus. Complete guide to Venus’s rulership of Vrishabha, the Moon’s deepest exaltation at 3° Taurus, the Venus-Moon enmity paradox, dignity of all planets in Taurus, and practical chart interpretation.
The lord of Capricorn in Vedic astrology is Saturn. Complete guide to Saturn’s rulership of Makara, the Mars exaltation and Jupiter debilitation that share this sign, dignity of all planets in Capricorn, and practical chart interpretation.
The lord of Leo in Vedic astrology is the Sun. Complete guide to why Sun rules only one sign, why Sun in Leo is NOT exalted (Aries is), dignity of all planets in Leo, combustion concerns, and practical chart interpretation.
The lord of Scorpio in Vedic astrology is Mars. Some Jaimini traditions also assign Ketu as a co-significator. Complete guide to classical rulership, Vedic vs Western differences, planetary dignities in Scorpio, and practical chart interpretation when Scorpio appears.