A 45-year-old previously well man presents to his GP with a 3-day history of productive cough, fever and pleuritic chest pain. He is febrile at 38.5°C, respiratory rate 22/min, heart rate 96 bpm, blood pressure 124/76 mmHg and oxygen saturation 95% on room air. Chest auscultation reveals crackles at the right lower zone and chest X-ray confirms a right lower lobe consolidation. CURB-65 score is 0. He has no drug allergies. According to Therapeutic Guidelines, what is the most appropriate empirical antibiotic regimen in the community?