There's another Maigret series, this one ran for a couple seasons starting in 1992. I watched the first 10 minutes of the first episode via my free trial (now not so free, but I'll let it run at least a month) of BritBox just to get a taste of it. It looks to be very conventional compared to the Rowan Atkinson series.
There's also a French version with Bruno Cremer that ran from 1991 to 2005. From one review that mentions both, it sounds as if the Cremer (as well at the Atkinson) Maigret is more authentic:
Both have strong qualities, although in many ways they are completely opposite. Gambon's Maigret is affable, poetic, emotional, sympathetic, and works in close concert with his men; his Paris (Budapest) is sunny and bright. Cremer's Maigret is taciturn and intense, preferring to wait silently while people reveal themselves, riding his men hard at times, especially the often incompetent officers he encounters outside of Paris; and his Paris (Prague) is always gray or pitch black, dark wet streets, his pipe glowing. In many ways the visual look of the shows are opposite, with the British series relying more on the romance and nostalgia of Paris, while the French series is a showcase for the dark psychological mysteries of Simenon. The French series hews more closely to the original stories, and also has the advantage of the episodes being 30 minutes longer; it is also a more complete canon, with nearly 5 times as many stories. In the Gambon series, Gambon is more pleasant, his men work with him as a clever team, and we see much more of Mme. Maigret, who appears in nearly every episode, but the humor and the characterizations are typically British, which can be somewhat disconcerting. The Cremer Maigret varies in quality with the directors, but he is almost always brilliant, playing his hunches and guiding his investigations with a deep psychology that truly honors the original Simenon novels. And it goes almost without saying, the French version pulls no punches and has a much darker way of exploring aspects of the French character that the heart of Simenon; Cremer spends a lot of time listening to people and asks questions which seem strange but reveal hidden truths. Gambon's Maigret does more of the talking and seems to succeed more through luck and teamwork, which may be failings of the shorter format and the transition from French to English storytelling.
I certainly got the idea of “conventional British” from what little I saw of the 1992 series with Michael Gambon. I would prefer to check out the French version if I am to go any further with Maigret. Of course, my eye will be out for those other two Rowan Atkinson episodes when they become available.
The Cremer series is available on MHz Choice (I had never heard of them) which you can stream through your Amazon Prime account (if you have one) or, as with BritBox, you can sign up directly. The individual episodes, as you can see, are also available for $3.99 each, which is a little pricey. I could buy one, but what if I get hooked? You see the problem. And three streaming services (Netflix, although I’m thinking of dumping it, FilmStruck, and BritBox, if I keep it) are enough. Still, I wouldn’t mind checking out the French version of Maigrot. The British/Gambon version doesn’t look all that compelling at first glance.