Rounded Wing tip

[murathan uzuner]

Im trying to design a rounded wing tip like the first design of the image. I made tip cap type round which kinda helped but its still not the shape I wanted. To get a more round shap I playeed with T/c and it helped as far as the left view considered but then the front view got bad. I also played a little with blending which kinda helped but still not the figure I want. I'm sure there is an easy solution so Im just asking to avoid wasting anymore time.