Analyzing examples of great landing pages (in terms of marketing, not just design) is the subject of my blog, Your Landing Page Sucks!

This article is quite popular: https://yourlandingpagesucks.com/startup-landing-page-teardo...

I also wrote a "Landing Page Cookbook" that got to the top of Product Hunt, and that contains a bunch of examples for every element you might want to put on your landing page.

Don't hesitate to message me/email me if you've got specific questions about your landing page.