Lookout is the other kind of good in which it has one use and reliably does it all the time. I'll almost never skip lookout. Obviously donate makes it redundant, and maybe chapel does too, but its non-terminal nature means pairing it with ambassador/masquerade/steward is useful, whereas those three don't play nice a lot of the time. Lookout/Ambassador is a devastating opening. The only reason I skip lookout is donate/chapel or some mad rush game. For me, lookout is #3 and shares the "S-tier" with ambassador and masquerade.
Lookout is really good but is it so much better than Forager, and Loan? Neither of them takes up an action. Loan gives +1 coin, but cannot trash estates. Forager gives +buy, +0/1 coin early game, but can only trash from hand, and also useful later in the game. Lookout gives only a little cycling, but can trash everything and not from hand. In my opinion, not so much difference in strength between them. Although I'd put Loan a bit higher on the list.
Actually Monastery as a 2 cost can really compete with those above.
I also think that Fishing Village is overrated but especially Enchantress. The attack usually does almost nothing.
Doctor seems really underrated here, along with Menagerie, and the falling Watchtower.