  Random sequential adsorption (RSA) of various two dimensional objects is
studied in order to find a shape which maximizes the saturated packing
fraction. This investigation was begun in our previous paper [Cie\'sla et al.,
Phys. Chem. Chem. Phys. 17, 24376 (2015)], where the densest packing was
studied for smoothed dimers. Here this shape is compared with a smoothed
$n$-mers, spherocylinders and ellipses. It is found that the highest packing
fraction out of the studied shapes is $0.58405 \pm 0.0001$ and is obtained for
ellipses having long-to-short axis ratio of $1.85$, which is also the largest
anisotropy among the investigated shapes.
