As rambunctious as this man

Nobody has used the word rambunctious for about 200 years.

It's still in use, its not archaic.

None that I can spot. Good work!

Nonsense. I alone use it on at least a weekly basis.

I have two rambunctious cats. There.

Yeah, me too. I know a couple of Babes who is, like, the rambunctiousiest, know what I'm sayin?

Normally God only has a capital when it refers to the Abrahamic deity. When talking about gods it's common practice to use lower case.

As rambunctious as this man was, he was still admired by everyone. Some of us struggle through our petty lives, swearing and cussing at everything we get our hands on. He chose not to do that, and instead he lived a life that would have been the envy of the Gods!

When, out of the blue and after many years of absence, he appeared at our doorstep, we greeted him with boundless affection. Flabbergasted by the hugs and kisses rained upon him, he was speechless and spellbound. Oh! how we missed this "Goliath of Wits", without whom our lives would have been stale and lifeless!

Are you translating a very old book?

It's an interesting writing style! I'm probably not all that qualified to talk about things like this, but in the first paragraph you mentioned that 'he lived a life' , which implies he is dead now. That clashes with the following paragraph.

Also, in this second paragraph, the last sentence mentions that you missed him, so, since he wasn't there, the state of your lives had been stale and lifeless, rather than would have been stale and lifeless (lives cannot really be lifeless though).

This last sentence also seems rather ironic, given the speechless and spellbound state he was in, but that is probably intentional.