Adjective : a pompous minor official. ,a pompous speech.    From Dictionary.com. 

At least, though, she deals with some of the problems in a serious but accessible and unpompous way, without using technical terms like ‘rigid designator’ (surely that is (pace you) a point in her favour), and she gives good links as pointers – to scholarly, often the original, articles, not just to Wikipedia.    From Wordnik.com.  [Perils of pop philosophy] Reference

But by and large, speech radio in Britain is a marvel: civil, unpatronising, unpompous.    From Wordnik.com.  [Telegraph.co.uk: news business sport the Daily Telegraph newspaper Sunday Telegraph] Reference

As for Clive Pritchard, he bicycles to his office every day and has become quite unpompous.    From Wordnik.com.  [Mrs. Miniver] Reference

"On a subject where there is plenty of pomposity to go around, I think he's a pretty unpompous guy," Hartman said.    From Wordnik.com.  [Salon] Reference

But in a short time, Vinius, by declaring to him that these noble, unpompous, citizen-like ways were a mere affectation of popularity and a petty bashfulness at assuming his proper greatness, induced him to make use of Nero’s supplies, and in his entertainments not to be afraid of a regal sumptuosity.    From Wordnik.com.  [The Lives of the Noble Grecians and Romans] Reference