the_post_thumbnail on another page

Hello, I’m looking to pull 3 blogs to an index page (all on same domain) with the newest post displayed for each blog. I currently can accomplish this with SimplePie & RSS, but I want to display the_post_thumbnail (featured image) along with this information & not a small thumbnail that is currently being used.

Can I pull the most recent post with the featured image to another page (index.php) without using RSS? The index page is located in ‘articles/index.php’ and each blog would be ‘articles/blog1/’ and so on.

If anyone can steer me in the right direction I would be grateful. Thank you !