I agree that the snakes are underwhelming. But at least those missions are short. I'm running through the Port Oakes missions now, and after clearing gangsters out of ship after ship, I'm starting to have fond thoughts of snakes.
I misread this as a contact chain: Vendetti, who would introduce Bocor, who introduced The Radio. Bocor does introduce The Radio (so would Mikey the Ear, at the right level), but Vendetti, Bocor, and Billie Heck are all introduced independently by the Broker.
I've only done Vendetti and part of Billie Heck so far, but you made a good choice omitting Heck. His story arc is pretty tedious so far: a defeat-all in a large office map and a ship's-hold kidnap mission. It looks like it might get better after this, though. Still, with each of the three contacts (Vendetti, Bocor, and Heck) requiring three newspaper missions and a mayhem mission to unlock, I'd argue that it's probably only worth doing one. Otherwise, that's nine newspaper missions, three Atlas Park mayhem missions, and a long damned time pausing XP at level 9.
So I might suggest phrasing the quoted line as something like:
Angelo Vendetti (5-9) and/or Billie Heck (5-9) and/or Mr. Bocor (5-9) > The Radio (10-14)
Or just omit Vendetti and Heck entirely, or relegate them to short descriptions as "Other Contacts" under Port Oakes.
ETA: The Billie Heck arc kind of grew on me. It still doesn't make much sense, but after those first two slogs of missions, it was kind of fun. Doing both Vendetti and Bocor might be a bit much, though, since they both have a lot of "defeat all the Hellions in the office" missions, which gets old. But they also both have badge missions, so some players might want to do both anyway.