I would offer a couple of suggestions, but the subjectivity behind how different people set the parameters of what they consider to be extremes...it's just too subjective. Eschatology (study of end things) is just too extreme for some people, and so they don't want to hear any of it. Others don't want to hear about the creation at the other end of the Bible because of the controversies. Others yet are fixated on getting nothing more than just warm fuzzies by hearing what good little Christians they are, and that they are living their best life here and now...
So, one would have to more clearly define where they are, and then surf the smorgasbord of flavorings out there to find what tickles their fancy.
When it really comes down to it, one can also go to this "extreme," (as some have viewed this to be):
1 John 2:26-27
26 I write this to you about those who would deceive you;
27 but the anointing which you received from him abides in you, and you have no need that any one should teach you; as his anointing teaches you about everything, and is true, and is no lie, just as it has taught you, abide in him.
That doesn't say that men teach us everything, and that men are true, but only the "anointing" (Holy Spirit).
Romans 3:4 God forbid: yea, let God be true, but every man a liar; as it is written, That thou mightest be justified in thy sayings, and mightest overcome when thou art judged.
This speaks loud volumes to the necessity for seeking the Lord in ALL things that we hear from men, not just SOME, not just MOST, but ALL things being subjected unto the Lord for His Spirit to instruct us. By comparison, ALL of us are liars!
MM