The GoldenSword monster list is still in beta form.

Here is a list of preliminary data, which should give you enough monsters to fight in an ordinary wilderness setting, plus a few more interesting things, a few undead, etc.

https://docs.google.com/spreadsheets/d/1nXi6ZtY8hSoMfUsQYUabtWO2idHLQDCOr9D4CpCvKGI/edit?usp=sharing

Doing a forest adventure? Use the d20 Random Forest Beasts

list of monster pages

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or you could try using these Open Source Monsters from Open5e, but their compatibility has not been fully play-tested