Says Lao Tzu...
Someone seeking learning, knows more and more.
Someone seeking Tao, knows less and less.
Less and less, until
By simply being,
everything gets done.
Get things done,
by letting them happen.
Struggling all the time,
gets you nowhere.
Ramana Maharshi - a great saint who lived on the Arunachala mountain of Southern India most of his life taught mainly through silence.
Francis Lucille - a living teacher who has a powerful silencing presence. His teaching is mainly through the direct path.
Sri Sri Ravi Shankar - another living teacher who spreads a feeling of joy and love. He has a beautiful organization which teaches a healing breath workshop.
Osho or Bhagwan Shree Rajneesh - a great teacher of all spiritual paths. His teaching covered all the great scriptures of the world. He also had numerous meditation techniques stemming from different traditions.
A more comprehensive list with many spiritual teachers can be found at http://www.Advaita.org.uk, a premier Advaita website, by clicking here.