Will accepting Udom's quests on Groundbreaker lock me out of the best ending?

I am on my first playthrough of the game, and there’s a decision you have to make pretty early on — turning in Phineas Welles to the Halcyon authorities. Specifically, on Groundbreaker, while speaking to Udom, you have the option to turn in Welles.

Now, I have read a few playthroughs (Polygon, GamerGuides, VG247 etc) that explain that The Board's and Welles' quest chains run parallel, and you can complete both quest chains if you so choose. But this is in terms of min/maxing experience.

None of them have mentioned, or I have yet to come across, what happens if you accept Udom's quest on Groundbreaker. Will accepting Udom's quests on Groundbreaker lock me out of the best ending?

EDIT: Best ending, I mean as in RPG tropes, the good/evil endings. I think the Welles ending is the good ending, whereas the Board ending is the evil ending. And with the low intelligence ending, I consider the Welles ending as the best ending.

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What happens if you turn in Welles on groundbreaker?

You'll head to Byzantium, the capital of Halcyon, and start working for and with the corporations. Turning him in sets you off on a path siding with the mega-corporations and maintaining the status quo, rather than fighting the system or improving lives.

What happens if I tell Udom where Welles is?

Udom Bedford will give you passage to Byzantium, the seat of power in Halcyon, where you'll immediately get to meet with a high-ranking official. From here on, you'll be doing some very unsavory quests for the Board, mostly involving assassination and other dirty deeds.

What happens if you side with Welles?

If you choose to side with Phineas Welles, the man who wakes you up from cryosleep at the start of the game, you will eventually arrive back at his ship to talk to him about what you've learned throughout the game.

Why Atiku Chose Okowa As Running Mate Over Wike, Udom - PDP Chieftain

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