is there any html element without any style?

No. Every element must have a value for the display property. CSS doesn't allow for the possibility of a null value.

<div> and <span> are the generic grouping elements, and there are numerous non-generic grouping elements. You just have to select the right one for the context (which depends on the markup and semantics involved, not the default value of display).

Well - at least with CSS3 you can control it better, e.g. in your div

style="all:unset;"

This can be used to the same effect as a reset style sheet.