In reply to R2B:
If you're in the vicinity of Chair Ladder, then there are a few E1s to look at, at Carn Barra. Dialectic is a good start, and don't discount the routes either side if you want to push into relatively safe, soft-touch E2s. There was a classic E1 in Crack in the Sky, but there appears to have been a rockfall. Anybody been on it since? A great shame, as that would have been a shoe-in for your list.
Also, a random bit of esoterica on Porth Loe, which is just over from Chair Ladder, in The Beak. Bit of a one-move wonder over a weirdly featured roof and a scruffy licheny finish, but safe as houses and a tick.
Other than that, I'd also second St Loy. You can park at the Treverven campsite for a couple of quid, which cuts the walk-in down to mere minutes, and there's a raft of decent single-pitch routes, all on flat ground. Definitely look up Sabre Cut - short, but great technical moves on good gear and a slab to boot.
Martin
Ps Astral Stroll is brilliant, of course, and changes in the upper pitches every year so it's never boring, but it's not your archetypal introduction to E1. But if you're in the area for, say, Right Angle, then the corner of Shark is a hidden gem at E1. You need lowish tide or you might need to belay off the ab rope - but the upside is you have a rope hanging next to the route.