I would agree with some of the above answers, but more as a literal translation. In practice, one is more likely to say either "in short" or "in other words" as a closer approximate meaning to the Chinese "總而言之". To re-phrase Bella's example. "He is friendly, kind, and warmhearted. In short, he is a good guy.

in a word/in one word = 总而言之，一句话

on the whole 总的来说，大体上。。。

altogether

sorry, I forgot to post an example with "in a word/in one word", here it is You are friendly. You are kind. You are warmhearted. In one word, you are a good guy. 你很友善，你很亲切，你很热心，总而言之，你就是个好人。