In my experience, albeit limited, you don't need anything approaching leetcode challenges to weed out the unqualified, even the good talkers.

FizzBuzz became a thing for a reason. Would you consider FizzBuzz leetcode? Would you consider a 5 minute discussion about how a linked list works leetcode, or whiteboarding pseudocode for a node structure and Add/Remove methods? (and for what it's worth, I almost never find a need to go even that far)

Parlay that 5 min theoretical discussion into 10 minutes of conversational discussion on application in practice and for anything less than a lead position I already know if you're "qualified" to be a potential hire or not.

I work at a small company with very low turnover so it's not like I've hired bunches of people, but in 10 years I've never hired a bad developer. Doubt I've passed on many good ones, either, though they might get passed on for other reasons.