I prefer to take whole food supplements rather than isolated or concentrated supplements, especially pills. Things like Maca root or Goji berries, that are high in antioxidants. Green tea to increase metabolism and help with fat loss, also high in antioxidants (though Yerba Maté is even better). Hemp protein powder (ground hemp) which has a very assimilable type of protein, as well as good fat (omega 6). Flax meal (fresh ground or kept in the freezer) rather than flax oil (which has been stripped of some of the nutrients in flax and is thus inferior to it, IMO).
Vega Energy bars (or Vega powder, if you can stand the taste, I have a hard time with it) are very nutritious, and contain some of the above nutrients.
Vega powder does contain a lot of isolated and concentrated supplements.
I agree about the flax oil though. I haven't found any that doesn't burn my throat, esp Udo's Oil. I only do the whole flax seeds now, eaten fresh out of the fridge in a smoothie or something. I would never overdo the flax seeds though as they do have more phyto-estrogens then soy and also have a lot of cyanide and other slightly toxic compunds that are not deactivated unless cooked. I've seen many sources suggest not eating them unless throughly cooked first. But if you cook them you oxidize their fragile and heat sensitive oils, so they should always be eaten raw, just not too much of them (1-2TB a day tops).
Hemp seeds on the other hand need no grinding, are totally safe to eat and not toxic, don't estrogen, and also have GLA which flax seeds don't. They also have an ideal perfect omega ratio and complete protein profile. Also are much tastier and easier to eat. I sprinkle them on everything from oatmeal to salads etc. or just eat them plain. Very good.
I would also look into Rhodiola.
What ZMA supplement are you taking? The only vegan one I've seen is the Max Growth P.M. by IronTek.
For anti-oxidants, foods are the best choice. Berries are very high, esp. blueberries and pomegranates. Dark chocolate, tea (roobios is cafiene free and as high as green tea in anti-oxidants). Prunes are very high. Cloves are high (in many teas as flavoring etc). Of course you can also take a supplement that has like pine bark and grape seeds etc.
I wouldn't take isolated vitamin E or A etc. though. Read this article:
Gaba is a good supplement for increasing HGH, but I'm wary of high doses of any isolated chemical / nutrient. Most have side effects.