Relatively impotent. Don't nitpick, being pedantic is MY job.

And that was centuries later. In other words, it took him time to regain his power, thank you very muchly. I mean, when the 'Necromancer' appeared, it was
millennia after Sauron got the worst manicure ever if I recall correctly, so that suggests that he needed that long to recover and plot his comeback. And if Isildur hadn't decided the One Ring was 'weregild' for his father's death and just dropped it into Mount Doom like a good little boy, Sauron wouldn't have come back, period. Instead, he got curbstomped by the orcs after the Ring left him, and centuries later, we have Smeagol, aka one half of Tolkien's ripoff of Fafnir from the Volsung Saga or the
Nibelungenlied, whatever's your poison.
And while we're on the subject of Isildur and the Volsung Saga, you know how his sword Narsil is reforged? Who's to say that isn't based on Sigurd's sword, Gram, which was also reforged after being broken? Tolkien was such a fanboy of Germanic and Norse myth, after all...
Also, surprised you didn't comment on the Shelob thing.