An IIR filter would be more efficient, and an elliptic filter the most efficient of those. The designfilt function may be the easiest way to create the filter you want, however it outputs a digitalFilter object that is a second-order-section implementation of the filter, not a transfer function, so it would then require the sos2tf function.
Since you want a transfer function, another way to design the filter using command-line functions would be something like this —
Fs = 1000; % Sampling Frequency (Hz)
Fn = Fs/2; % Nyquist Frequency (Hz)
Wp = 100/Fn; % Passband Frequency (Normalised)
Ws = 110/Fn; % Stopband Frequency (Normalised)
Rp = 1; % Passband Ripple (Attenuation)
Rs = 60; % Stopband Ripple (Attenuation)
[n,Wn] = ellipord(Wp,Ws,Rp,Rs); % Calculate Optimal Filter Order
[b,a] = ellip(n,Rp,Rs,Wp,'low') % Transfer Function
figure
freqz(b,a, 2^16, Fs) % Filter Bode Plot
Explore the available options to design the filter you want.
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