Oregairu is similar to Seishun Buta Yarou Wa Bunny Girl in lots of ways.
The main characters are more or less similar- lonely, don’t get along well with others, logical, have a complex past which cannot be explained and are outcasts.
If Seishun Buta Yarou is among your top five then you should certainly give this anime a go. Oregairu has everything, complex relationships to analytical thinking.
One of my favorite quotes from the series.
“Fake people have an image to maintain. Real people, just don’t care.”