The first 20 Class 47s were built with ETH in 1962-63, but it was rarely used (they were dual heat locos with boilers, and steam heated stock was far more common) and so no more were fitted with it new until the last two 47s built, D1960 and D1961 in 1968. Every other 47 was boiler-fitted apart from the 81 no-heat locos that would later become Class 47/3. Therefore, no 47s were built with both ETH and SSC, although around 100 were built with boilers and SSC (see the list in the above post).
132 more 47s were retro-fitted with ETH in the early 1970s, so that when TOPS came in, there were 154 47/4s, numbered from 47401-47555 (there was no 47548, long story). None of the 132 that were converted to ETH were slow speed locos, as this was still a useful requirement and so they remained freight locos.
However, by the late 70s the requirements for SSC fitted 47s were dropping, mainly due to the introduction of the Class 56s. A number of boilered SSC locos were transferred away from their Yorkshire and North-East depots to places like Stratford where they effectively became passenger locos. So when the move from steam heating to ETH gained speed, and a new batch (47556-47585) was converted to ETH, many of these locos were included (47169 being the first in 1979). Since these were meant to be purely passenger locos, the SSC and the boiler were both removed.
When the next batch of ETH conversions came about in 1983, again a number of boilered SSC fitted locos that had been transferred away from the depots that supplied MGR trains were converted. Eventually the whole batch of 22 locos from 47164 to 47185 were converted, but the other batches were untouched. However five more, 47232/239/240/242/243, were converted to twin-tank 47/4s in 1986.
37/4s did not have slow speed control (some of the 37/9s did when rebuilt). I believe the only locomotives built with both SSC and ETH were the Class 50s, although the SSC was rarely used and was removed when they were refurbished in the late 70s. The 33/2s were fitted with SSC in the late 60s, making them the only BR type to have ETH and SSC for any length of time.