If we're talking overall history. Fatality still remains the #3 best pure clan of all time(after MM & FOE). Fi is the only other pure clan to beat MM and FOE in a fullout in their own servers. Fi had 90+ titans and pushed MM to clan wars, Fi for 2 years had the best cmb pures from 2013-2015 when 07 started. Fi dominated most of their existence than slumped. I will say this, Fi currently isn't the best but every clan has had their brown sticky stuffty year/months/days.
TLP is #4 because they reached their peak on 07 and battlescape lol. Every other pure clan reached their peak in pre-eoc, which was long before any 07 clan had their shine. 2015 i will give TLP that year but 2014 and back, you can't say brown sticky stuff about Fi.
I will say TLP was a better clan than EoP. So hold #4 tightly.