A Structure section with an entry to a channel index
I like what Matt P wrote in his answer:

try to consider how someone [else] will find the logic of the CMS design

The other factor you want to consider in information architecture is you only want store data once in the database. So how you intend to pull that data out also is going to influence your decision on how you store it.
The good news there is Craft really lets you pull data from virtually any place in the system very easily so it kind of comes down to an organizational choice. You have 2 options: Matrix or Entries.
Matrix Fields
You might consider a matrix field because these attach right on the entry itself. That way, a user edits the Leadership entry directly, they'll find the data there, in an intuive away. The other bonus is you can move the entries up and down in a certain order or turn them off right in the context of previewing the page.
Matrix is a good option if the data is more-or-less confined to that entry and you don't need to access the data anywhere else in the system.
Entries
If you need to relate content back to each other, or you find the leadership team data needs to exist in a context outside that particular page, it's probably the best option to bring them in as a channel (or structure).
Craft 2.5 made a huge change as to the way you can edit related entries right in the same entry. You might want to consider using an &quot;entries&quot; field that relates back to your Leadership channel and let the user pick exactly which team members you want to spit out on that page. The other benefit is in this way, you can open up  those &quot;related&quot; entries right from the Leadership entry, much like a Matrix block would—enhancing usability—but you still keep them as entries.
TL;DR
I don't know how many people are on the leadership team but if you have but more than a couple dozen, it might make sense to keep them as entries. Otherwise if you don't plan to use that data anywhere else in the system, a matrix field could be a nice option too.