How to translate "很不起眼儿" in English What's the best (传神) translation of "很不起眼儿" in English?

例句：


  不认识他的人觉得他很不起眼儿，认识他的人觉得他很优秀。


辨析：

A more formal term that related to "很不起眼儿" is "其貌不扬", but
"其貌不扬" will normally be "很不起眼儿", yet "很不起眼儿" does not necessarily means "其貌不扬". So the side question is,  

How to translate "其貌不扬"?

UPDATE

Thank you for the answers, by 传神 translation, I meant to ask what people would say in their daily expressions...

"他很不起眼儿", my closest English translation is "He's quite a normal Joe", but "很不起眼儿" is a bit stronger than that
my preference: "很不起眼儿" can be translated into “unimpressive”,while "其貌不扬" into "unimpressive-looking". The reason is that "unimpressive" can refer to many aspects such as his appearance, his achievement, and etc. Compared with"很不起眼儿", ""其貌不扬"is more specific to the appearance, so "looking" is added to "unimpressive".