So Indra and Ashura had kids, it is too bad we don't know who they were. Although I wonder why there are no Otsutsuki with Sharingan. On the second though there are none at all with or without sharingan.
You didn't put much thought into this thread... No offense
Think about it:
1. Indra/Asura were stated by the manga to be the ancestors of the Uchiha and Senju. That alone should tell you that they had kids. Heck, we even saw Asura's kids in the filler.
2. There were obviously Otsutsukis with sharingan aside from Indra. In fact there still are now. Every time you look at an Uchiha with sharingan, you are looking at an Otsutsuki with sharingan (just with a different last name). Remember, Uchihas descend from Indra (an Otsutsuki) which in turn means that Uchihas are Otsutsukis. Now, I assume you meant to say that there was nobody with the last name Otsutsuki who had sharingan. Well sorry to break it to you, but that is incorrect as well. Indra's kids would have most likely had the last name Otsutsuki, and if any of those kids were sons then they would pass on the Otsutsuki name as well. It is most probable that these kids and descendants awakened sharingan as well. We just never saw them, but just because we never saw or heard of these specific individuals doesn't mean that these people didn't exist.
3. You are honestly focusing way too much on the names. You need to understand that names change over time due to things like marriage, intentional name changes, aliases, and other special circumstances. The name Otsutsuki probably just died out when one of the last daughters of Indra's descendants married some man (who probably had the name Uchiha). That man with the name Uchiha was probably just associated with some clan (that didn't have any special traits at the time), and when Indra's descendant married that man, the sharingan mixed into the Uchiha's bloodline (thus creating the Uchiha clan we know today), and the Otsutsuki name simply disappeared from Indra's line. It's similar to what is about to happen to the modern day Uchiha clan once Sarada marries someone. Once that happens (and once Sasuke dies), the Uchiha name will be no more. Yet, even if the Uzumaki becomes the new clan that is famous for having sharingan, it would still be invalid for future generations to say that there were never Uchihas with sharingan.