I have experience using each of these languages professionally, working in a team. Each of them have their own foibles that you'll be constantly railing against:
Python:
Large Python projects require discipline. To make it work, you'll need to adopt a rigid style, like DI, and use it religiously. It can be done; people do it, but if you think using Python will lower the barrier to entry to getting on the team, think again. Large projects in any language require talented people.
Go:
I don't like Go, so I have the least experience in it out of the three. There are positives, like fast compile times, but lacking generics and exceptions just makes Go annoying to me.
Haskell:
I have written a quite incredible amount of Haskell and before using it in a team, I was a huge proponent. Haskell is a well-designed language, but suffers a few major drawbacks. Large Haskell programs can take an age to compile; this is a productively killer. Universally agreed upon good styles for writing large Haskell programs don't exist. Library support is lacking. Space leaks will bite you. I would strongly advise against starting a large Haskell project.
To wrap up, in terms of your criteria, the language you use isn't going to change things very much.
* Each language has a good community for long term support,
* Complex code in any language is buggy; simple code in any language is less buggy,
* Good developers are hard to hire,
If performance is important, Python and Haskell perform similarly for code that people actually write. Go does better.
Python:
Large Python projects require discipline. To make it work, you'll need to adopt a rigid style, like DI, and use it religiously. It can be done; people do it, but if you think using Python will lower the barrier to entry to getting on the team, think again. Large projects in any language require talented people.
Go:
I don't like Go, so I have the least experience in it out of the three. There are positives, like fast compile times, but lacking generics and exceptions just makes Go annoying to me.
Haskell:
I have written a quite incredible amount of Haskell and before using it in a team, I was a huge proponent. Haskell is a well-designed language, but suffers a few major drawbacks. Large Haskell programs can take an age to compile; this is a productively killer. Universally agreed upon good styles for writing large Haskell programs don't exist. Library support is lacking. Space leaks will bite you. I would strongly advise against starting a large Haskell project.
To wrap up, in terms of your criteria, the language you use isn't going to change things very much.
* Each language has a good community for long term support,
* Complex code in any language is buggy; simple code in any language is less buggy,
* Good developers are hard to hire,
If performance is important, Python and Haskell perform similarly for code that people actually write. Go does better.