I did a general check of my photo's: the most flare I get from the Sigma 20 mm (nice halo's) and Samyang 14mm at f/2.8 (big burst that covers half the frame). Neither of these flares may be sufficient for you though. The 100-400L gets ugly purple/green crosses when car lights shine directly into it on the race track. It must be said I'm generally impressed with the resistance to flare of most of my lenses.
5Dmk3, 5Dmk2, Sony NEX-6 | SY14mm f/2.8, Ʃ20mm f/1.8, 35mm f/2, Ʃ35mm f/1.4A, 50mm f/1.8 I, Ʃ50mm f/1.4 EX, 100mm f/2.8L Macro, 17-40L, 24-105L, 70-200 f/2.8L IS II, 1.4x II, 70-300L, 100-400L | E-mount: 16-50 OSS, Ʃ30mm f/2.8 EX DN, 55-210 OSS | 2x FT-QL, AE-1 Program, some FD(n) & FL primes