You're concentrating on minor surface details, such as five year plans, the Comintern, and whether Stalin's generally understood motives were his true motives. The important parts are that Bhelen has a similar personality as Stalin had, he ascends to power by similar means, he modernizes his country and makes it more prosperous, he is successful in war, he purges the traditional elites who oppose him, and his reign benefits the common people to some degree.
Harrowmont is shown to be a complete failure in the epilogue. He isolates Orzammar from outside influences, he reinforces the caste structure that is the foundation of dwarven stagnation, he refuses outside help, he brutally crushes the rebellion of the casteless, and he dies relatively soon without leaving a clear successor. Harrowmont doesn't have any kind of success in the Deep Roads. Even with golems, his only real achievement is a brief war with Ferelden, as the dwarves kidnap humans and elves to create golems.
What you refer to as "minor surface details" are the bread and butter of history, events and policies involving thousands and millions of individuals. What you refer to as "the important parts" are almost completely irrelevant. You see a "basic" similarity between Bhelen's personality and Stalin's. Okay: but you go
so basic as to widen that net to encompass dozens and dozens of leaders throughout human (and, undoubtedly, dwarven) history. Like I said earlier, that makes it a
bad comparison.
All of that, incidentally, leaves aside further errors in what you have to say. Stalin and Bhelen did not "ascend to power through similar means". Stalin used his command of the CPSU bureaucracy to slowly freeze out and eventually eliminate a host of rivals over several years; his eventual rise to dominance involved nothing so open as a coronation but rather took the form of a recognition of
fait accompli: he already controlled the Soviet Union, it's just that Trotsky, Zinoviev, and Kamenev hadn't realized it yet. Bhelen has his siblings murdered and exiled, possibly murders his father into the bargain, but can't get anything other than that done and doesn't actually gain power unless he is crowned by the Hero of Ferelden.
And Stalin's purges didn't target "traditional" elites at all. Both Stalin and his enemies were figures of the Revolution, not of the tsarist regime. His party-political enemies, a collection of disparate and mutually loathing cliques, bore no real relationship to the entrenched deshyr aristocracy. And his military enemies came from all origins: former tsarist soldiers that fought for the Reds in the Civil War were condemned along with men who had come up through the Party from day one. Stalin sometimes chose to label these men as "counterrevolutionaries", but that was an obvious propaganda tool, not a statement of objective fact. In fact, the entire concept of the Revolution, a concept central to any attempt to understand Stalin and the other CPSU figures from the Civil War, is absent from the dwarven example.
The rest falls into the "painfully vague" category - either too vague to use as a basis for comparison ("successful in war", lol), or too vague to have a mutually acceptable definition ("modernizes", "benefits common people").
Whereas I have to actually demonstrate how the Stalin comparison is bad, you yourself show how little Harrowmont resembles Chamberlain. Literally none of the things you said about Harrowmont - crushing rebellions, isolation from the outside, creating golems, the caste structure, failing to leave a clear successor - has anything to do with Neville Chamberlain. You could not have painted a more different picture if you had tried.
Look, I'm merely doing what any other historian worth her salt would do if confronted with that comparison: laugh at it. It's really not good at all. I'm not sure why you chose to stick with it and attempt to argue that it was a decent one, rather than either 1. defending it as a spur-of-the-moment top-of-the-head inexact quick hit rather than a legit historical comment or 2. agreeing that it wasn't good and suggesting an alternative that still demonstrates your basic claim that Harrowmont is an incompetent feeb on the wrong side of history whereas Bhelen is a ruthless scumbag who is kind of on the right side of history.
While I'd pictured all of this happening within a very short time frame, there's nothing technically in the slides saying that Harrowmont couldn't have, for example, outlived Meredith.
Sure, but then we're deep into the realm of headcanon. If Harrowmont's measures to limit trade and fight wars with Ferelden and whatnot - assuming that they even happen given the dubious canonicity of the epilogues - take place after the time period of the games, do they even matter?