Can you give me your preferred grip, budget, and weight? The general consensus is that getting a mouse with the PMW3366, 3360, 3310, 3330, 3988, and 3989 are the best choices but everything else is based on preferences (besides the weight being above 140g).
I personally own a Zowie EC1-A, Logitech G102, and a Nixeus Revel. Any of the 3 are brilliant mice, if you want something similar to the Sensei get the Nixeus Revel, Dream Machines DM1 Pro/Pro S, or the Zowie FK1/2/1+
The Razer Deathadder and the Rival 300 are both solid choices but honestly if I were you I'd just get the G403 or the Deathadder Elite if I wanted a right handed ergonomic mouse that's for large hands.
I personally own a Zowie EC1-A, Logitech G102, and a Nixeus Revel. Any of the 3 are brilliant mice, if you want something similar to the Sensei get the Nixeus Revel, Dream Machines DM1 Pro/Pro S, or the Zowie FK1/2/1+
The Razer Deathadder and the Rival 300 are both solid choices but honestly if I were you I'd just get the G403 or the Deathadder Elite if I wanted a right handed ergonomic mouse that's for large hands.