I'm still watching the classic doctor who so this list will be updated every time a new companion shows

• Ace
• Sarah Jane Smith
• Leela
• Jamie McCrimmon
• Romana I/II
• Jo Grant
• Mel
• Steven Taylor
• Polly Wright
• Nyssa
• Tegan
• Ben Jackson
• Zoe Heriot
• Dodo Chaplet
• Vicki Pallister
• Barbara Wright
• Turlough
• Grace Holloway
• Victoria Waterfield
• Ian Chesterton
• Sara Kingdom
• Susan
• Peri
• Katarina
• Adric