I'm not sure I completely understand the point of your question. First of all, the property Additive implies the property MultiByScalar. Indeed, to multiply a ciphertext $E(a)$ by a scalar $b$, you can simply use a square and multiply algorithm, adding a ciphertext to itself to multiply its plaintext by two, which allows to multiply in polynomial time $E(a)$ by $2^k$, for all the positions $k$ corresponding to a $1$ in the bit decomposition of $b$, then summing all those ciphertexts to get $E(ab)$.
Note that the additive variant of the ElGamal ciphertext does also satisfy this property, but unlike Paillier or LWE/RLWE, the decryption is not efficient.
Ciphertexts with the additive property have automatically this multiplicative property; they are sometimes called partially homomorphic. Somewhat homomorphic encryption schemes refer to schemes in which you can both add and multiply encrypted value (and not just an encrypted value and a scalar), but you can do so a limited number of times (say, lots of additions and a few multiplications).
So, every additively homomorphic encryption scheme (Okamoto-Uchiyama, Goldwasser-Micali, Benaloh, ElGamal, LWE/RLWE...) satisfies your two properties (and only these two properties, regarding homomorphism: only some very specific lattice-based encryption scheme are both additively and multiplicatively homomorphic).