Obviously not.
Maybe Byzantine Emperor, though.
But many of them ended up murdered by their family members or other political rivals, not to mention killed in wars.
This is the point, influence is the thing that matter the most. I'm not seeing president as the top influencer, it's the King Maker that put the pressure and pull the strings.
Yep. This is one of the points I'm addressing in my ongoing novel project. The original title of the game it's based on was
Kingmaker: Rise to the Throne (the title had to be changed for legal reasons). The pov character was considered the kingmaker by the game developers, but given how they presented the other characters, I think they should have paid attention to their own storyline.
Historically, a kingmaker is someone who could plausibly take power for him/herself but chooses not to, as it's more profitable to be the power behind the throne. The "kingmaker" in the game was actually a different character than the one we're supposed to think.
On the topic of this thread... while the Prime Minister enjoys perks and a certain amount of prestige and general good will around the world (except in the U.S. and China, both due to actions taken by Trump), the person who does have the authority to topple a government is the Governor-General (the Queen's representative).
Most GGs go along with what the Prime Minister wants, as is customary. Their appointments come from the Queen, on the advice of the Prime Minister, and I don't know of any time that the Queen would have refused to appoint whoever the PM chose.
But once in office, the Governor-General does have the power to withhold Royal Assent from bills, or to sort out election-related chaos that can happen when a minority government is elected but the party with the next highest number of seats claims to have enough backing to form a coalition government with more seats.
The GG can prorogue Parliament if the PM requests it; this is what happened some years ago when Stephen Harper didn't have the integrity to deal with a contempt of Parliament charge, so he asked the GG to prorogue Parliament. This made the contempt charge go away without having to call an election.
The Governor-General's position is largely ceremonial - lots of speeches, diplomatic events, and so on, as the GG is the Queen's representative. Many GGs just coast on through the term of their appointment, but some do make an effort to go above and beyond. I have tremendous respect for our current GG, Julie Payette. She's a former astronaut with two shuttle missions and a trip to the International Space Station under her belt, and she's using her GG appointment to promote science as career options for girls and women, and for better science curricula in schools.
So in this whole hypothetical scenario, forget being PM. It's a daily grind of speeches, travel, and being criticized no matter what you do. Justin Trudeau could figure out a cure for cancer (or COVID) and his political opponents would still find reasons to gripe about him. I'd rather be the Governor-General. It still means speeches and diplomacy toward people I'd probably rather kick off the planet, but it does carry some ability to hold governments to account and prevent egregiously bad legislation from passing (if the House and Senate have failed to do their jobs properly).