TLDR: Pick something to build around while including Stealth Rocks. Pick a strong sweeper to Baton Pass to. Don't destroy your team's balance by overloading it with Baton Passers. If you do, account for Taunt and Phazer spam. Try to give your team some other win conditions by having other threats besides your Core Baton Pass receiver.
Disclaimer: This is advice assuming you're playing in Smogon's OU tier as that's what most people in this forum play.
You could grab a suicide lead so you can set up Stealth Rocks and maintain momentum as you switch to something else. Viable suicide leads are Azelf, Garchomp, Scolipede. Scolipede can also Baton Pass fairly well instead of suiciding if you run a Protect set to pass off Speed Boosts.
You could also go for a more traditional Stealth Rock setter such as Ferrothorn (Better Forretress, just no Rapid Spin), Landorus-T, Heatran, etc. They can take hits well and can deal with annoying priority users like Talonflame/Breloom.
If you're starting from scratch, I would recommend figuring out a core for your team. pick 1-3 Pokemon that is the main focus of your team and build around it. e.g. If you wanted to use Mega-Pinsir, you would need something to remove Stealth Rocks and something to deal with Talonflame. Since you want to Baton Pass, maybe something that has trouble setting up by itself usually. Something that can't take hits well at all like Weavile, Talonflame. You could also go something bulky like Mega-Heracross that can be Baton Passed in and start punching holes into Switch-ins. There are a lot of options.
Strong stall Pokemon include Mega-Sableye, Gliscor, Skarmory, Amoonguss, etc. There's an annoying Sigilyph set you can run if there's no Dark types on the enemy team since you like uncommon Pokemon.
The important thing to remember is balance. You don't want 4-5 Baton Passers because that makes your team too one-dimensional. Your win condition is basically pass to Pokemon X and hope X doesn't get walled or Revenge-killed. Once Pokemon X is gone, it immediately makes all the Baton Passers useless. You could stall with whatever you wanted as your sixth Pokemon but most people carry at least one Stallbreaker on their team. Taunt and Whirldwind/Roar are big issues that must be addressed. Your team needs to be able to force switches so your opponent can't just sit there spamming Entry Hazards and phazing you.
This turned out way longer than I initially wanted.

