I guess I should have specified Western third parties. Going by VGChartz
Lego sold better, but it was originally a Wii U exclusive, so that's more or less expected plus Lego usually sell pretty decently on Nintendo hardware, likely due to the younger demographics. I don't really have many other good examples for comparison considering that most western third party games on Switch so far are late ports, so direct comparison is unfair. Going by the games that you mentioned (and some other late ports):
Now are these most of these bad figures? I wouldn't say they are, but beyond L.A. Noire (for some reason), all of them are unquestionably lower than XB1/PS4. Now is that fair, considering the Switch's significantly lower install base? Again, not particularly. Still the point remains that major third party games sell less on Nintendo hardware.
As for the developers touting high sales on Switch? Those are almost universally indies. You see Team Meat and Team17 happy. Do you see Bethesda touting how successful Doom or Skyrim was? EA with FIFA? No, because they weren't impressive. I want to be crystal clear. I do not think that indies are lesser. I do not think they are not important. They aren't lesser and they are important. HOWEVER, indies need lower numbers for the Switch to outsell other consoles, something that is greatly helped by the lower quantity of games on the platform. An indie selling 10k is a success, 100k massive, 1m unthinkable. But EA, Ubisoft, Square Enix, etc? Needs more than that.
All of this is on top of what many others here have said, that porting to the Switch takes time. If a game started development in 2015/16 for release in 2017/18, most AAA's literally CAN'T have a Switch version ready around launch.
Thanks for this compilation of data. I must admit, that numbers look better than I expected. Especially that L.A. Noire sold more than on Xbox and half of the PS4-number is a surprise to me. Remember VGC tracks physical and L.A. Noire needed a ridiculous download to play on Switch.
Anyways, your point stands: big third-party games mostly sell worse on Switch. We haven't seen much that started on equal conditions so far (same time of release and stuff like that), so it might be a bit better in the future. But we'll see.
Indies by the way can also produce a port much faster. Technical porting is no big problem, but in a big company resources must be allocated for this. Before the managers decide on that they probably meet ten times and discuss that. And then the allocated team must finish their previous project. At an indie this hirarchy is much smaller (if present at all).