There are 4 that stick in my mind. All mainly for my appreciation towards their teaching methods.
Both my English and History teachers through GCSE and my Religious Studies teacher at AS were all pretty chill. Ms. Brown, Mr McGrath and Ms. Grey respectively. They allowed a lot of creativity in how we presented our material, and I was a A student in all of them. Those were also the lessons a popped in on during the final weeks when I finished school a year early** to go into college for media. (Being such a traditional, independent, ex-boarding, science and maths orientated School my Chemistry teacher really hated my decision. He practically gave up on me once he heard).
Mr. Edmunds - My maths teacher AND the Deputy Headmaster. He was old school with his teaching method and punishment. He's grab you by the ear or sideburns if you messed around, force you to do stupidly difficult problems on the whiteboard if you really pissed him off. Also on Fridays we had him final period, so he'd make us stand behind our desks and we weren't allowed to go until we each answered some mental arithmetic; It was a good week if you landed an easy question. His methods were old school, but he must have had a permanent source of chill pill being injected into him between lessons because he was awesome as anything. And he knew his sh*t because he seemed to make everything up off the top of his head.
**This was in 6th form between AS and A2, so the final few weeks of the AS year were used as prepping for A2, which the teachers figured I didn't need to be there for.