+1 on the wolly buggers. I always liked all black and all olive.
My other go to streamer is an olive maribou muddler.
Those are very good colors. You don't need a lot of different colors.
Think of colors in 3 basic categories:
1) Dark: all black or very dark olive.
2) Medium: medium olive / tan / amber / brown
3) Light: All white is probably best. Some people like yellow, but I haven't really tried that.
All white is murder for stocked trout. But can also be good for wild trout sometimes. It is also good for smallmouth bass.
Here are some streamer tips:
They work best when the water is up and somewhat off color. A "chalky green" water color is very good.
They work best when the light levels are low, i.e morning and evening.
When fishing streamers never use tippet lighter than 3x. I learned this lesson the hard way! Big trout will often break off 4x tippet. But very rarely break off 3x tippet.