1. "I completely agree."
2. "You're absolutely right."
3. "I couldn't agree more."
4. "You have my full support."
5. "That's exactly my thinking."
6. "I'm in complete agreement with you."
7. "I share the same view."
8. "I'm on the same page as you."
9. "You've captured my thoughts precisely."
10. "I'm in accord with that."