This female gamer would beg to differ about the popularity of paladins with female gamers. Not to mention I have a male friend and long-time gamer and DM who exclusively plays female warriors (fighters/paladins/gunslingers).
But would like to ask for both high and low voices in the different character-specific sounds in general.
That said, the paladin could very easily be temporarily done with combat sounds from Valleros - Male Fighter, with the channel energy and spell sounds from Kyra - Female Cleric (which don’t have vocal sounds). Ezran - Male Wizard has a “mount summon” spell sound for bringing one’s paladin’s mount into being. The universal one-shot “blade spell” could be a good smite sound. Board Game Player’s Spellcaster - Sorcerer and Spellcaster - Sorceress have a sound called “hand of healing” that could be a good lay on hands effect, and it would come with both male and female voices.