I've had Tartan Day gatherings at my home for 12 years now and hope to do so for many more years to come. One of my favorite Scottish profiles has to be one of my own - Robert Lyne, who was third in a known line of de Lynes who owned the free barony of Lyne in Peeblesshire. His son David owned the estate of Loquhariot near Edinburgh, and one topographical account of Scotland notes that the Lynes are the earliest owners of Loquhariot of whom there is any record. Also, the family was associated with the Anglo-Norman families of Balliol, Morville, and Hay, the latter of whom became Marquisses of Tweeddale. Robert is Lyne-29.
Other favorite Scottish profiles include the Reformer John Knox, Knox-428, though I think there's much more that could be said in his bio. I would say William Wallace the patriot, but I haven't been able to identify him yet at WikiTree. There's a whole boatload of William Wallaces with no dates, and I haven't checked them all. Surely he must be here somewhere.