These are too expensive but nice to have...
Canon 200-400mm F4L 1.4TC
EF 14mm f/2.8L II USM
Thinking of the Samyang 14 mm as it is much more sensible, budget wise.
To get a wide angle option on my 7D:
EF-S 10-22mm f/3.5-4.5 USM or (more likely) Sigma 10-20mm f/4-5.6 EX DC HSM
5D3, 5D2, Sony α6000, G16 | EF: SY14/2.8, V20/3.5, 28/2.8 IS, Ʃ35/1.4, 50/1.8, 50/1.8 STM, Ʃ50/1.4 EX, 100/2.8L IS Macro, 16-35/4L IS, 24-105/4L IS, 70-200/2.8L IS II, 1.4x II, 2.0x III, T28-300 VC PZD, 70-300L IS, Ʃ150-600 OS HSM S | E: SY12/2, 35/1.8 OSS, 16-70 ZA OSS, 55-210 OSS, SY300/6.3 ED UMC