Mary Oliver is a favorite, as is Elizabeth Bishop.

Donald Hall and Billy Collins were both recent Poet Laureates I found quite accessible.

Marge Piercy has some nice poems about her cats.

I mean I can keep going, but what kind of poetry do you like? Humorous? Short? Long? Rhymed? Free-verse?

I'm not much of a poetry lover, honestly, and my tastes in that area actually surprise me. In literature I prefer sedate nineteenth-century Brits, but for poetry give me smart-mouthed twentieth century women. Go figure. (Two favorites that come to mind are Edna St. Vincent Millay and Dorothy Parker.)