There's a difference between rose tinted nostalgia and context. I wouldn't say E's "extremely overrated"; especially when you consider what they did in the context at the time. The top 3 (FI/FOE/MM) were/had been untouchable for a couple of years and they broke that in F2P. It wasn't like opening a clan today, pulling 100 and beating FOE/EOP or whoever and claiming to take #1. They had to gradually climb above clans like CP, TLP, IR, EOP, DV then FI, FOE and then MM; probably when RS clanning was near it's peak (when pull's ranged from 40's - 100's weekly). That list includes a number of top top clans, which people are all putting on their lists here.
Do they deserve to be on someone's top 5 list of all time? No; simply because they were only around for 2 years and did very little in the P2P scene against the big boys - but even though I'm bias, I still think that's a pretty notable achievement.
Anyway, my list.
1) MM - Will probably always be everyone's number one.
2) FOE - Will probably always be everyone's number two.
3) FI / EOP - It's too close to call, cba to justify dates etc
4) ^
5) TLP
6) CP - Honourable mention
Only reason I've put TLP above CP is because I've always though CP lacked an identity. What are they the best at? I'm not sure. Sometimes they look like world beaters in F2P Clan Wars, but then the next week they'll lose 3-0 to a bunch of noobs. For a month they'll be #1 F2P in the wild but then they'll get beat for a couple of weekends and drop back down the ranks. With TLP, they've always been one of the best (not the best cuz FOE ;ppppp) in P2P matched and post 2011 kicked on in F2P matched.
[/essay]