For the third attempt at this sort of a challenge, I have chosen former Prime Ministers of Canada.
All of the people on this list are already connected to the main tree, but most of them do not have a full set of great-grandparents listed on WikiTree. In order for us to add this list to the Relationship Finder Quick Links page, each person on it needs to have at least one line going back as far as their great-grandparents (and, of course, preferably all eight great-grandparents).
For those former Prime Ministers who don't already have eight great-grandparents listed on WikiTree (or have "Unknown" people listed within three generations), the task is to seek out, source, and add profiles for as many missing great-grandparents as you can find. As you take on a Prime Minister, and add a new great-grandparent, please post a message here, so we can keep track of how we're doing.
If you can add sources, photos, or biographies, add siblings, children, aunts, uncles, etc., or improve the profiles of these former Prime Ministers or their family members in other ways, so much the better!
P.S. I'm not a WikiTree Leader, and have no authority to assign points, credit, or anything like that. My intent with these challenges is for them to be a fun little break from whatever you're doing regularly. (Well, that, and preparing lists of different kinds of notables for the Relationship Finder Quick Links page.) There's no time limit, there are no prizes, and if you have fun finding and adding relatives, then you win. (And WikiTree wins in any case, because the more connected profiles we have, the better the tree is for everybody.)