I have already presented the effects from conjunction of five Grah/Planets in one house in my previous post, and here are combinations of six and more than six Grah/Planets conjoined in one house, at the time of birth.
If present in 1st house/Bhava or 12th house/bhava or any other house, each house will have a different result, e.g. If Sun, Mercury and Venus are present in Ist house, the results will also differ based on which Nakshatra they are present, how close Mercury and Venus are posited to Sun, and many other factors, and then that 1st house can be Aries or Virgo or Pisces, the results of such combination in each house will be different, as Sun is exalted in Aries and debilitated in Libra, Venus is exalted in Pisces and debilitated in Virgo, Mercury is exalted in Virgo and debilitated in Pisces, so please don't read a combination and feel bad or good, these are very general rules which change depending on position, status, Avastha of each planet, any combination needs to be seen from Ascendant as reference point and not as an individual entity.
I am going to add some data so that readers can co-relate with some real person.
1. SUN-MOON-MARS-MERCURY-JUPITER-VENUS YOGA. If these six planets join together, the native will be learned, virtuous, will have an emaciated body, be acquainted with many languages and will have distinguished knowledge.
Effects of 7 Planets in conjunction
I am still looking for one such chart where seven Grah or Planets are posited in one house.