Let's say someone is looking for the best Christian church/group/denomination, a place where they hope to find the right kind of fellowship, support and the teaching of accurate and sound doctrines. For such a seeker, there should be nothing better than being guided by God Himself to the right church. Which Christian denominations or groups consider themselves to be in that position, with such a degree of confidence that they openly invite/challenge people to ask God Himself for confirmation that they are the right church? I know that Latter-day Saints are one example. Are there any others?
I'll assume that researching what the Bible actually says rather than blindly accepting what the minister says is a form of "asking God for confirmation".
The original Worldwide Church of God explicitly encouraged people to test what it taught, facts and doctrines that often contradicted mainstream Christianity (or Churchianity, as they often referred to it).
Twenty years after Herbert W. Armstrong's death, I am still trying to do what he told everyone. "Blow the dust off your Bible and prove it for yourself. Don't believe me, believe the Bible." He clarified so many truths with Scripture that it became too easy for us all.
— "Blow the Dust Off Your Bible"; "Purify the Bride"; "Hold Fast": Remembering Mr. Armstrong | United Church of God
Most of the groups that formed following the breakup of the church still preach that same philosophy. For instance:
As he [Roderick C. Meredith] so often said with great power and emotion, “Dust off your Bible! Don’t believe me because I say it! Believe it because you read it in your own Bible!” He often challenged his audience to “check up on me!” In other words, check up on what he was teaching and prove for yourself whether he was right or wrong. How often do you hear mainstream ministers challenge you to do that?
— "He Tells It Like It Is!" | Living Church of God
Their message is quite different from those organizations whose preachers appeal to emotion rather than to logic, and the exact opposite of the one that requires one to believe what their leader says because he is infallible.