James MacDonald - one of my very favorites today. He is amazing as a speaker.
Woodrow Kroll - One of the more underaprecciated great preacher/teachers out there. Another of my very favorites.
Chuck Swindoll - What can I say that hasn't been said of him. Not that we are worshiping or glorifying any man, but Swindoll has been an amazing tool of God in his many years of ministry.
Tony Evans - I love his passion and his heart.
Adrian Rogers - Chuck Swindoll pt. 2. We sadly miss him being a part of the living Body of Christ, but he is in a better place now. If you can still catch his radio ministry you should.
David Jeremiah - another very powerful and effective minister on the radio.
Ravi Zacharias - my favorite living apologetics master. Good, short, concise radio show also.
RC Sproul - being a dispensationalist, I often disagree with him, but I'm a very academic type so I do like his style. I also love and value church history and historic theology, and those are areas that he is very good and informative in.
There are others who I catch less frequently, but above are my favorites.