In terms of new poets, I really enjoyed Cynthia Zarin's collection "The Watercourse."
My favorite English language poet is probably Ted Hughes, but he is well known, of course. I also love Dylan Thomas - again, hardly unheard of. I also love most works by Wilfred Owen.
Since you mentioned Akhmatova, I am going to list some non-English favorites - hope one of those will be new to you
In Russian, my favorite classic is probably Alexandr Blok (at the moment). It changes. I am also a big fan of Afanasii Fet, Marina Tsvetaeva, and Nikolai Gumilev.
In Polish, my favorite poets are Czesław Miłosz and Wisława Szymborska (sorry for being so predictable).
In Old Norse my favorite poet is Egill Skallagrimsson. He might also be my favorite named poet of all times.
I also enjoy the works of "anonymous" in a variety of languages
