You are not quite right. Saruman is not more powerful than Galadriel. I guess she is the most powerful creature of the white council. Let me explain why I think so:

1. In the Lord of the Rings, Tolkien clearly stated that "The only way that Lothlórien could have been conquered by the armies of Mordor is if Sauron had come there himself wielding the One Ring, for against that power the Elves could not triumph"

So you can see by yourselves that Sauron cannot beats Galadriel without the ring of power.

2. In the first age, for example, Lutein easily beats Sauron. Another example is that even Morgoth (a god and master of Sauron) was almost overpowered by Fingolfin. Consider the fact that Saruman, Radagast and Gandalf powers are limited or restricted. Moreover, Galadriel was trained by the most powerful sorceress in the first age and she combines the blood of all three elvish royal families.

3. Tolkien explains magic in a very abstract way as it can be observed. Sometimes if you are confident and determined you can achieve great things. Examples a lot, Gandalf defeat the balrog of Morgoth.

You are not quite right. Saruman is not more powerful than Galadriel. I guess she is the most powerful creature of the white council. Let me explain why I think so:

1. In the Lord of the Rings, Tolkien clearly stated that "The only way that Lothlórien could have been conquered by the armies of Mordor is if Sauron had come there himself wielding the One Ring, for against that power the Elves could not triumph"

So you can see by yourselves that Sauron cannot beats Galadriel without the ring of power.

2. In the first age, for example, Lutein easily beats Sauron. Another example is that even Morgoth (a god and master of Sauron) was almost overpowered by Fingolfin. Consider the fact that Saruman, Radagast and Gandalf powers are limited or restricted. Moreover, Galadriel was trained by the most powerful sorceress in the first age and she combines the blood of all three elvish royal families.

3. Tolkien explains magic in a very abstract way as it can be observed. Sometimes if you are confident and determined you can achieve great things. Examples a lot, Gandalf defeats the balrog of Morgoth.