One of the eight medicine buddhas, Ashokattamshri holds both hands in the meditation gesture (like Amitabha but without a bowl). The above wears a patched monastic robe with a broad hem decorated with an incised pattern.
Anantatejas is one of the thirty-five confession buddhas. He holds his left hand in the meditation gesture and the other is extended palm out (like Ratnasambhava but without a gem in the palm).
Viranandi holds the stem of a lotus in his left hand and a sun disc in the other (unless it is a full moon, in which case it would be Brahmadatta).
Buddha Nagaraja is easily recognisable through his hood made of seven snakes. He holds his hands at heart level in a gesture specific to him.
This Licchavi-revival sculptures, a style that was popular in Tibet around the 17th century, depicts one of the confession buddhas, identified through an inscription on the back.
On the very useful Himalayan Art Resources website, Jeff Watts explains that there are various ways of depicting the 35 confession buddhas. They may simply have particular hand gestures, or they may hold an attribute. Some of them have the same hand gestures as the five dhyani buddhas. The main figure at the centre – and part of the set of 35 – is usually Shakyamuni, but it can be Nageshvara Raja (also known as Nagaraja, not to be confused with the historical character of the same name). Occasionally, Maitreya and Amitabha are added. With sculptures, unless there is an inscription on the base, identification is often very difficult because there is no body colour to go by and because sets have often been split and various buddhas have the same iconography.