You seem like such a sweet, adorable person. You're making me want to aggressively boost your self image! Researching Alpha SFs and just appreciating the heck out them-good call, if you're pretty sure this could be your type.
Director Abbie had good points about the POLR and being a 9 making the type unclear. E9 is a stereotypically SEI type, and I think I read somewhere that it has the strongest correlation with MBTI ISFP (which is still usually Socionics ISFp--not j--despite what most people seem to assume).
If you are EII like you've thought previously, you already know why you should be proud of that type. But in case you are Alpha SF, I'm going to share some reasons to be proud (warning-loooong wall of text).
Alpha SFs are not doormats. They may avoid conflict, but it's out of a preference for preserving harmony and well-being, not out of a lack of strength. Alpha SFs are some of the most open-minded and accepting people you will ever meet. Their curiosity for novel and untraditional things is equally as strong as ILEs and LIIs, so they will not reject such things outright. It's almost impossible to be 'too weird' for anybody from the Alpha Quadra. They may have the reputation for being 'dumb', but they are intellectually curious (Ne and Ti seeking) which can motivate them to research subjects deeply, anyway. Also their perspectives are more grounded in reality than their intuitive counterparts, so they catch things that intuitives with their 'heads in the clouds' often miss.
Alpha SFs can talk to anybody. Most people feel safe with them and will open up about things that they wouldn't dare tell anybody else (even those who are shy or awkward tend to have this effect on others). And the SFs aren't even rattled by this, almost nothing strange or personal will bother them. It's quite a social skill. SEIs especially may come across as naive, and ESEs have a weak Ni, but they are able to compensate for this social deficite by use of excellent attention to detail. Alpha SFs pick up on non-verbal cues in conversation such as facial expressions and body language quickly and accurately. They know how anybody is feeling in response to them, immediately. Their intuition may be weak, but they still have the 'gut instinct' that is there when necessary (and I know mine works, even though I can't explain it).
Alpha SFs have the ability to impact the emotions of others through the physical environment in powerful and deliberate ways. Want to create something with such a dramatic effect on the human psyche that people automatically stop and stare? Alpha SFs already intuitively know how that's done. This ability is not openly celebrated as much (at least in the society I come from), but try creating something and watch how your friends and acquaintances feel as they look at it.
You can also create things that are perfectly soothing and relaxing to witness, and that skill is needed in this stressful world.
But personally, I enjoy the dynamic impact my creations have on people more than my ability to calm them down or comfort them. Sometimes I find the emphasis on the 'caregiving' aspect of Si to miss the mark, in these written type descriptions. Yes I want to make people feel good internally, but oftentimes pleasure is obtained by invigoratingly intense and contrasting sensations, not just comfort. With Si, the SFs' sensitivity to their internal state allows them to do this without causing so much aesthetic discord that the creation becomes merely ugly. You can combine and contrast many different elements in a way that still turns out beautiful and enjoyable. So there's more to the Si/Fe abilities than just making people feel 'warm and comfortable', though that's a useful aspect to it as well.
For ESE, who else could invigorate and 'win over' their LII dual so well? LII is a common popular ideal (think Mr. Darcy from the Jane Austen novel and how many women love him), but they are too withdrawn into their own cold, intellectual world to be easily romanced. ESEs have the influence over others of SEEs, but they're not as concerned about being perceived that way. For SEIs, who better could encourage and support the creativity of ILEs? These are some of the most accepting and open of people.
So to sum up, I think being Alpha SF is great. If it's your type, you will find satisfaction and purpose in SF talents. It's easiest to feel good about yourself when you're doing what brings you joy and confidence, so I just hope this boosts your self image and encourages you to explore your abilities more (no matter what type you are).