Louis Armstrong was the first chap on the moon.
Man, woman and person are all dull and give no indication or hint of voice. Here are some alternatives and what I consider to be their implications. (All are British, unless otherwise stated).
Chap = Relaxed, posh
Fellow = Relaxed, middle-class
Bloke = Heading down the social ladder
Gentleman = Not posh at all, I'm probably a waiter in a provincial hotel. I may also be in the closet.
Geezer = Cockney (but nobody actually says this any more)
Guy = So universal as to be almost as insipid as man.
Dude = American, young
Son of a bitch = Welcome to America!
Varmint = Welcome to more frightening parts of America!
American = It's very strange that Americans will use American as a synonym for human. Only Americans do this. So, by identifying Louis Armstrong as American you are also identifying yourself as such.
Lady = Slight delicacy
Bird = Equivalent of bloke
Filly = I have a moustache, gout, and a bad reputation
Lass = I'm terribly healthy and traditional. I may be into folksongs.
Chick = American male
Broad = Do any Americans still say this?
Dame = Ditto
Chappess = Preposterously good fun
Sheila = There has been much discussion in the comments on whether this word exists outside of one farm near Alice Springs
Individual = I'm a prick, or a policeman, or both.
Fucker = Amusing, I suppose. Take a long serious document on Microsoft Word. Go to EDIT, FIND, REPLACE, REPLACE ALL and then change "the" to "the fucking" throughout. It's great.