In your list, I would not even consider Sahaja Yoga as a form of yoga. It is just something which the founder has invented in the name of yoga, of which the founder has absolutely no direct experience. That is what has happened since yoga has entered into the markeplace, just about anybody can organize a group of techniques and call it yoga. Those kinds of “yoga” are not intended for the expansion of awareness, but to fulfill the demand and supply of the people in the marketplace.
As far as the other yogas - kriya yoga, Raja yoga, laya yoga - it is difficult to draw a sharp dividing line between them. What one is calling “Raja Yoga” is just a scientific formula for the expansion of consciousness through meditation. The formula of it’s eight limbs can be applied to so many different methods in the yogic sciences. The last three limbs of Raja Yoga - dharana (concentration), dhyana (meditation), and Samadhi (integration), are the the very peak of the science of the expansion of consciousness, everything else is being done as a support for these last three limbs. These three limbs together are called Samayama. The other five are skillful means to prepare for Samyama.
I would suggest that you become more familiar with what these eight limbs are. Ordinarily, the methods of Hatha Yoga - which are centered around purification of the nadis and awakening the chakras, are used just as a foundation to prepare and purify ones system for the next phase of work, meditation. When Hatha Yoga is used by itself, then it is more of a method for awakening the Kundalini energy through more physical processes - asanas, bandhas, kriyas, mudras, pranayam and so on. Hatha Yoga is not separate from the tantric sciences either, in fact it has it’s origins in Tantra. All of the tantric sciences work with the chakra system and involve the awakening of Kundalini.
When you are dealing with Laya Yoga, one is referring to a number of practices which seek to awaken the Kundalini through more meditative processes. It is also not separate from Tantra because of this. Laya Yoga also involves the work of Samyama and is in this way not separate from Raja Yoga.
So do not assume that if you are practicing a form of yoga, that it is restricted just to one approach. All of the various different forms of yoga are interrelated on various levels-it is just a matter of what is your inclination and which approach you are going to emphasize. Do not let their existence confuse you. What is important is to find just one approach, and take that approach to it’s very core with a certain amount of discipline and one-pointedness.

