About the only way is to cut back the limb that is out of proportion with the rest of the plant and give the plant more sun. You had good bud set and the leaves look nice and healthy, but more sun would give you shorter more balanced growth and help it fill in.

If you aren't brave enough to cut off the gangly part, then cut off the ends of the gangly part. New buds should open up on the stems of the gangly part. But more light will make it come back with much better shape.

If you have to move it, they are easy to move. Just remember they have shallow roots and the root should not be disturbed any more than necessary.

Here is a link that might be useful: How to grow rhododendrons and azaleas.

Thanks for your advice!

I just whacked one that was similarly out of shape. It is tough but I know it will fill in.

About 4 years ago, hubby and I tried to pull up a huge rodie in the front yard. All that was left was a stump, and we could not get it out so we left it. I came back so beautiful. This year it finally has tons of blooms. Glad we left the stump. lol

I would move it. It's way too close to the house. It will eventually flop over and possible break the first time it snows or ices up.