Actually, back in the day, that's exactly what the top encyclopedias aspired to do. It's worth looking up who wrote the main entries in the 1911 Encyclopedia Britannica. Future Nobel laureate Ernest Rutherford did the entry on radioactivity. British medical researcher Joseph Lister (the inspiration for Listerine), wrote the entry on slime molds. Environmentalist John Muir weighed in.
And, in my absolute favorite, Russian anarchist Peter Kropotkin wrote the article about anarchy.
https://en.wikipedia.org/wiki/Susan_Collins
There is a whole section and separate article on her political positions.
As an encyclopedic reference it looks like a pretty good reference. Obviously a strong narrative like a new Yorker profile can't be expected of an encyclopedia.