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Republic F-105 Thunderchief
Variants

YF-105A - Two pre-production prototypes.

Republic YF-105A (S/N 54-0098), the first of two prototypes). (U.S. Air Force photo)

YF-105B - Four pre-production aircraft.

F-105B - Initial production model; 75 built.

JF-105B - Test aircraft re-built from RF-105B airframes; 3 converted

RF-105B - Proposed reconnaissance version of the F-105B; none built.

F-105C - Proposed dual-control trainer; cancelled in 1957, none built

F-105D - The definitive production model, all-weather capability thanks to advanced avionics, first flight 9 June 1959; 610 built.

RF-105D - Proposed reconnaissance version of the F-105D; none built.

F-105E - Proposed trainer version of F-105D; cancelled in 1959, none completed

F-105F - Two-seat trainer version of F-105D, fully combat-capable, first flight 11 June 1963; 143 built.

F-105F of the 44th TFS/388 TFW at Korat. (U.S. Air Force photo)

EF-105F - Initial SEAD/Wild Weasel version; 86 built.

F-105G - Two-seat Wild Weasel SEAD version, 61 converted from EF-105F and F-105F.

Sources:
Wikipedia: F-105 Thunderchief