I have to concur, that series still makes me laugh. I've always enjoyed Rowan Atkinson when he's actually talking over Mr. Bean, and the supporting cast is great.
I'd have to recall all the series I've seen, although some are hard to gauge because they may have had a slight decline over time, dipped in the middle, or aren't finished yet. Quite a few series start off strong then never quit while they're ahead. I've been watching more animation than live action as of late, since many of the main stream live action shows are just horrid, but in terms of trends they're pretty similar when it comes to quality.
Of the more recent shows I've watched that are finished, I'd say Bojack Horseman is probably the closest in terms of consistent quality throughout the series. There's other recent shows I'd love to comment on... but they aren't finished and could crash and burn ultimately.