Lati Rinpoche was a tulku and former abbot of Ganden Shartse, that had thousands of students through out the world. His teachers included Kyabje Zong Rinpoche and Kyabje Trijang Rinpoche, the senior tutor to the Dalai Lama.
He went into clear light in 2010 at the age of 88. I found this interesting video about Lati Rinpoche, and also the rituals that were conducted at his cremation. When they opened up the cremation site, they found relics in the ashes.
A lot of rituals and pujas were done afterwards at his funeral which are usually done for high lamas. They’re not done for Rinpoche himself, but are done to create merit for his students, so they can meet Rinpoche again or someone qualified like him.
I think practitioners of Lati Rinpoche’s caliber are quite rare. I think if you get a chance, one person to receive teachings from would be Kyabje Choden Rinpoche. He was born in 1933 so he’s getting up in age now, but it’s not too late.
During a teaching, Lama Zopa Rinpoche once reflected on how fortunate it was that a woman was able to attend teachings with Choden Rinpoche. He said that:
“Just seeing Choden Rinpoche, sitting in front of him, is incredible. We see billions of people in New York, but we don’t get that blessing or benefit for the mind as when we see Choden Rinpoche. Seeing him, she gets that benefit, purifying the mind, receiving peace, and that deep feeling. She got that from somebody who not only has the realization of bodhicitta, who is a bodhisattva, which is an incredible blessing, but from a yogi who has the clear light realization, who is a Chakrasamvara practitioner. Even just being in front of this person, she receives blessings and is purified. Also, this person’s neighbors and the insects and people around this yogi receive blessings and are purified. Being in front of Rinpoche is incredible. It is said that if this kind of practitioner crosses over a bridge, then under the bridge the insects, worms, and beings are liberated, their negative karma is purified. This is very fortunate. “
You can find his teaching schedule here.