Instapage has a very strong feature set, basically giving you complete freedom over how your landing pages look and what they do. You get to pick from a vast range of templates or start with a blank slate. The drag and drop editor is very intuitive and it allows you to design each element just the way you want it, no code required. If you do want to tinker with the code you can override the CSS code for any element on the page.
A/B testing, heatmaps, dynamic text, conversion analytics are all there and working great. Instapage works great for teams, with roles and accounts neatly built in.
There are also plenty of integrations available so no mater the CRM you're using, you'll probably be able to use it seamlessly. Zapier is also available should you want to get creative with the data.
Pricing starts at $69/month and is not cheap for the beginner entrepreneur but is still a great deal considering the benefits. Enterprise clients are welcome on the custom plan, which offers concierge services.