I think we have traded this concept before.
Can there be a God without Satan?
We must say yes.
Can there be Satan without God?
I can’t see it as possible.
One of the greatest challenges on my road to Christ was this issue.
Do we need to acknowledge Satan, in order to know Christ?
No, God pre-existed the devil.
Salvation means delivery from evil. The Lord’s Prayer reads, deliver us from the Evil One (poneeros). Some sense of an enveloping evil that needs to be escaped, even if you aren’t calling that Satan, has to be there to accept or pursue a salvation. But IMHO.