Dektol is a good developer with which to start. More than a few million photographers have ended up finishing their careers with it too, it's that good.

Another alternative is Ilford Bromophen. It's a hydroquinone-phenidone formula instead of hydroquinone-metol, and phenidone is known to be more friendly to those who have sensitive skin (some can develop allergies to metol). In Canada I find that Bromophen is quite a bit more expensive than Dektol, but I like it a little better. It goes a little further (you dilute it 1:3 rather than 1:2 like Dektol). One nice thing is that it comes in metric packaging (the 1L Dektol packs are too expensive relative to the awkward US gallon size).