What is the best way to bolster ECs?

Hi! I'm a rising senior that has taken 5 AP courses and 2 other dual-credited courses. I've been doing searching into which colleges I would like to go to and recently found out that I would prefer to go to an Ivy League school over most others. I have been very active in my passions and extracurricular activities, however, as I have recently been starting to look at the average applicants that are admitted to Harvard and Yale(which are my preferred two colleges so far), I have noticed that most people are coming into these colleges with massive leadership roles in their communities or having accomplished multiple large feats. I have done some interesting things, but I am having a hard time figuring out good ways to equate them to the presets that are located on the profile tracker. I also am a very uninteresting applicant ethnically(I'm white and male). I do have more complex parts of my identity, such as that my adopted sister from China is deaf, so I am fluent in American Sign Language. I also take part in deaf events and have helped organize some as well(e.g. I assisted in organizing and running a Christmas party for the deaf families around the community).

I have been a speaker on the family track for That Conference which is a technology conference located at the Kalahari in Wisconsin and is fairly large. For that presentation, I prepared a device that functioned off Arduino that converted an electric piano's MIDI output to a light board that represented each key and could assist the deaf community in understanding music and also in being able to enjoy it. I also took/am taking part in Destination Imagination(DI), in which my team and I placed top 10 globally. We also won a Spirit of DI award at the global competition(meaning that your team represents the core beliefs creativity and problem solving to help communities globally). We did that through my ties and experience with the deaf community. I am currently attempting to start a non-school affiliated DI club that would sponsor student teams to go to Global Finals(it is quite expensive). One main portion of my question is this: Would starting a financial organization to support local teams be a large selling point on an Ivy league application, or just a drop in the bucket?

My other main affiliation is with music and drama. I was/will be part of my school Forensics team, where I placed extremely high(1st-6th place in every tournament). I also take part in school plays, where I have netted core(second to lead) roles in every play and I also take slightly smaller parts in the musicals. I intern through my local community theater to help with kids shows as volunteer work and also participate in adult shows where I have had solos and lines. I am also going to be helping with the business side of the school drama by interning for one of our business teachers(he runs the school's drama financials). I worry that all this may not be enough. If it is not, how can I make myself stand out more in terms of these things? Should I branch out?