Which is better for Lead Generation: Hubspot, Adobe Marketo, or Salesforce Pardot?

Hey guys! First off, thank you in advance for your insight.

My company is mid-sized and we have several profit centers, meaning we have quite a global outreach, and we're still expanding. I've been tasked to research into lead generation tools and I'll be honest… after hours of researching, I'm still not sure what exactly I should be looking at which is why I'm here asking for advice.

To give you a clearer picture, I'm trying to figure out which software (Hubspot, Marketo, Pardot) would be more efficient in lead generation automation – meaning, handling large amounts of data with respect to data hygiene. Also, a big one would be ease of use and upkeep. Budget isn't a problem as far as I know.

If you have any other suggestions on other products I should be looking into or if you require any further information to better assess my needs, do not hesitate to ask

Again, thank you so much for your help guys. Greatly appreciate it.