If I would be building lead gen from scratch, here is what I would use:
1. Orchestra dot org OR
Phantombuster/Texau to gather data/lists/intent
2. Clay to connect it to relevant emails/other intent in there, be more granular
3. A tool like reply.io, Lemlist or Expandi for outreach
4. A tool like Folderly to keep your email boxes well-oiled
5. Go to the church, put a candle, and say Hallelujah, three times :)
Do you like my list? What is missing?
P.S. I am considerate of all religions, so you can use the exact replacement for a candle that you use in your own religion to wish you luck.