Nathan, lots of good suggestions all around.
I agree with some of the others, specifically that you break it up a bit, the long list should go under == Timeline == and you should have (before it) a short bio, maybe an == Early life ==, == Family ==, == Occupation ==, etc.
Now, regarding the "timeline," I have a timeline in a profile I'm working on - when I started, I think it is all that there was. I added the early life, family, occupation, etc., and the timeline wasn't so noticeable.
But even so, I found that it was difficult to pick out the details of the person in the profile, it was a bit blurred by the info about the deaths/births of so many relatives. I tried this, and (in my mind) it worked swimmingly:
I indented (using a : before) all of the facts that were for others. Here is the profile,
Samuel H. Baty
if you scroll down to "timeline," you'll see what I mean.
But it looks like something like this:
1885 Birth of Joe
1887 Birth of Joe's brother Mike
1900 Census records family living in Macon
1903 Birth of Joe's sister sally
1910 Census records family living in Macon
1911 Joe marries Mary
As for putting sources and info for others, I think that it is fair only so long as it has a bearing on the profile. Listing the birth/death of a sibling plus that source is valid. Much beyond that should be on the other profile. Merely hyperlinking the sibling's name should suffice for that even.