ESP or SVG. Whtch is better to submit to Adobe Stock

Adobe prefers SVG for icons. 

For more complex graphics, use Illustrator files, with the embedded PDF. 

EPS is legacy format. You should avoid that. 

• My first choice for print & digital output is editable Adobe Illustrator file (.ai).  It gives me the most options.
• My second choice is a Scalable Vector Graphic file (.svg).  That's what I use most on the web.
• If I absolutely have to, I will use Encapsulated Post Script (.eps) but I prefer not to.  It's a zombie file type from the last century that few designers use anymore.

Hope that helps.