Henri Christophe
L'empereur
The core of what became the Kingdom of Scotland was the Kingdom of Alba, which conquered the Kingdoms of Strathclyde, Galloway, Dal Riatu, Fortiu, the remainder of the Pictish Kingdom, the Hebrides, and for a time the Isle of Mann, as well as Orkney and Shetland directly from Norway. Saying that this was "already in MODERN Scottish borders (key word, MODERN) and that they were all Celts (other than the Hebrides, Orkney, and Shetland, and POSSIBLY the Picts, as there's some doubt on their ethnic and linguistic heritage, though most historians have accepted them as Celts, though not Gaelic Celts), means they did NO conquest or their conquest doesn't count as such, somehow, is a strange, and even revisionist conceit from a modern viewpoint, but one that shows an utter lack of perspective toward the time period in question.
If they are all Celtic kingdoms, that don't fullfil the requirement to be an empire, who is conquer another nation. Cool the kingdom of Alba be able to conquer other Celtic kingdoms and raise a great Scottish-Celtic kingdom, but they aren't an empire, they are just who be able to united the Celts of the Highlanders.
An example to help to understand this concept, Ho Chi Minh defeated the US-Army and conquer the South Vietnan, but he isn't an emperor and Vietnan isn't an empire, because he just united a nation, he doesn't conquer another nation.
I don't know that much about Maori, but they look like the Tupi-Guaranis of my country, the Tupis also has a violent warrior culture, their society need doing war to fulfill the "ritual canibalism", it's look like Aztec ritual sacrifice, but they also eat their captves. Before the arrival of the Tupis in Brazilian coast also had another society we know as Sambaquis, and even with that violent warrior culture, the archeology suggest the Sambaquis wasn't destroyed by war, but by assimilation. Probably anyone is able to know what really happens in New Zealand or in Brazil, but assimilation can't be discarted so easy.As for the Maori, they were a proud and violent warrior culture - that could already be clearly seen by their own tribal warfare and the wars they engaged with against the British when the British first arrived and began dealing with them. I believe they were an offshoot, at some point, of the feared (in it's day) Tu'i Tonga Oceanian Empire (and that was an "Empire," by the way, not just a city-state like someone very recently on this thread suggested). Thus peaceful and gentle assimilation of another people by the Maori seems hard to believe or be a credible guess.
Why would you think I want Maximilian? I'm saying that there are leaders that Mexicans actually are proud of, why make it a leader that Mexicans aren't proud of?
Maximilian was a Pendejo! Benito Juárez is the great heroe to Mexicans, and he is a hero exactly because defeat the Maximilian. I was working in Mexico this year, and every city I was there have a statue of Benito Juárez and on street called Benito Juárez (and it is always on of the most important street of each city).
Benito Juárez is just fudging amazing, he was the first Indian president of Americas (untill Evo Morales in Bolivia, was also the only one), he born in a Zapotec family, just learn Spanish when had 12 years old, was slave in Cuba and finish his life as President of México, after defeat the troops of Napoleon and dethrone an Habsburgo Emperor.