Russian speech tends towards using genitive of никто and ничто. In this case, regardless, that should be in the accusative[or genitive] никого.

The object of a negative verb can be in the genitive as opposed to accusative... Sparingly I hope.

English often uses "what" as multiple objects at the same time. "I don't know what youre talking about" In Russian they absolutely avoid this and say "I do not know that, about what you are talking"

"Думаешь о том же, о чём и я?" ------ Are you thinking WHAT I'm thinking. Basically "Are you thinking about what I'm thinking about?"

Что, который is wrong because it's two relative pronouns on either side of a comma which doesn't really make sense. Also technically что is neuter.
то, что - what .... Rarely, English will say "that, which", which is a more fleshed out construction like Russian's.
который - which. As used to add info to a noun previously brought up. The book, which

Other constructions tend to involve an answer-word+comma+question-word: answer-words, as they are sometimes called, involve a т; question-words involve a к

...так, как... - how ~~~~~~ Сделай так, как я тебе показал Do it how I showed you
...тогда, когда... - when ~~~~~~ Приду тогда, когда ты ... I'll come when you... bla bla bla
English doesn't use the old words wither, thither, whence, thence etc. We just use "where" in all cases
...туда, где... - where ~~~~~~ Иду туда, где счастье ждёт. I go where happiness awaits
...там, где... - where ~~~~~~~~ Телефон - там, где и всегда The phone is where it always is
...там, куда... - where ~~~~~~~ Телефон - там, туда ты его поставил. The phone is there you placed it.
...То, кто... ~~~~~~ This one, just like "...то, что..." is very versatile, because both ends will be declined to whatever end the sentence demands:
...того, кому...
...тех, кем
and so on...

Technically the clause order could be flipped too:
Кто слышит родителей, то получит успех.
То, кто слышит родителей, получит успех.
Кто слышит родителей, то получит успех.
I feel like we English speakers definitely tend to overuse participles once we know about them, since they cover so much ground, and one may not know alternative terms used to link clauses.

Participles are the most formal, then который, then just the words что and кто. ..., который подходит (которые подходят) ---> ...,что подходит (что подходят)
As you can see что offers much less matching capability than который, because it doesn't designate a gender, but it's shorter and quicker to say.