How much you wanna spend? If you're on the hydroxytyrosol polyphenol kick and on a budget... I recommend Partanna red or yellow label, Sicily. They have it at Walmart in a can or bottle. I use it in my ginger and turmeric tea and a spoon ful in the am and pm. It's Sicilian. $10 a bottle $17 tin can.
Olive Ranch, California. Walmart and Publix. It's a good all around oil. They have Original, Mild and Bold or Robust one of the two. $6. I use this on my avocado boats in the air fryer. It's really good.
Terra Creta. Greek. This is my favorite Higher low end. I get it from Amazon in a bottle $25.
On the lower high end, Olio Verde, Sicily. It's an affordable higher end.
The harvest date is really important. If it only has a "Best By" date they..."experts" say it can't be trusted. You want a harvest date as close to present year as possible.
Unlike wine, it doesn't get better with time. Like wine, there are a gazillion things to consider. Mikey likes a blend. I don't.
Sorry if it's TL;DR.