Most powerful Elf on Middle Earth (3rd age)

[the phantom]

Elrond is only half-elven, and I think that alone is enough evidence to support that Galadriel is the most powerful.

You're a newbie so I won't be too hard on you for saying that. This statement was discussed in another thread, you should check it out. Here's the link-
http://forum.barrowdowns.com/cgi-bin...c&f=1&t=003332

There you'll find that Galadriel being 100% compared to Elrond being half-elf gave Galadriel NO ADVANTAGE WHATSOEVER. In fact, it might have been to Elrond's advantage.